JP5657965B2 - Flow control body - Google Patents

Description

  The present invention relates to a flow control body, and more particularly to flow control for efficiently exchanging heat between a tube wall and a fluid in a tube structure.

Conventionally, for example, as described in Patent Document 1, in a pipe through which a fluid flows, a heater is disposed on the outer periphery of a pipe wall, and the fluid is heated by the pipe wall heated by the heater. there were.

JP 2007-002986 A

  However, conventionally, in a pipe that heats a fluid by a tube wall heated by a heater, the fluid cannot always be efficiently heated.

  The present invention has been made in view of the above problems, and one of its objects is to provide a flow control body that realizes efficient heat exchange between a pipe wall and a fluid in a pipe structure. To do.

  A flow control body according to an embodiment of the present invention for solving the above problems is a flow control body disposed inside a pipe structure through which a fluid flows, and guides the flow of the fluid radially outward. It is characterized by having a non-perforated plate and a perforated plate that is arranged on the downstream side of the non-perforated plate and disperses the flow of the fluid in the radial direction. ADVANTAGE OF THE INVENTION According to this invention, the flow control body which implement | achieves efficient heat exchange between a pipe wall and a fluid in a pipe structure can be provided.

  The outer diameter of the perforated plate may be greater than or equal to the outer diameter of the non-porous plate. The ratio of the distance between the non-porous plate and the porous plate relative to the outer diameter of the non-porous plate may be 0.3 or less. Moreover, it is good also as having the said several perforated board arrange | positioned in series in the flow direction of the said fluid.

  In addition, a downstream portion having a tube wall heated or cooled to heat or cool the fluid and an upstream portion provided on the upstream side of the downstream portion are disposed in the upstream portion of the tube structure. It may be done. In this case, the ratio of the outer diameter of the non-perforated plate to the inner diameter of the upstream portion may be 0.7 or more and 0.95 or less. The ratio of the length of the upstream portion to the inner diameter of the upstream portion may be 3 or less. Moreover, the said pipe structure is good also as having an inflow port part provided in the upstream of the said upstream part, the inside diameter is smaller than the internal diameter of the said upstream part, and the said fluid flows out.

  ADVANTAGE OF THE INVENTION According to this invention, the flow control body which implement | achieves efficient heat exchange between a pipe wall and a fluid in a pipe structure can be provided.

It is explanatory drawing which shows an example of the cross section of the pipe structure in which the flow control body which concerns on one Embodiment of this invention is arrange | positioned. It is explanatory drawing which shows the external appearance of an example of the flow control body which concerns on one Embodiment of this invention. It is explanatory drawing which shows an example of the perforated plate contained in the flow control body which concerns on one Embodiment of this invention. It is explanatory drawing which shows an example of the attachment structure to the pipe structure of the flow control body which concerns on one Embodiment of this invention. It is explanatory drawing which shows the other example of the cross section of the pipe structure by which the flow control body which concerns on one Embodiment of this invention is arrange | positioned. It is explanatory drawing which shows the result of having evaluated temperature distribution in Examples 1-4 and Comparative Example 1 which concern on one Embodiment of this invention. It is explanatory drawing which shows the result of having evaluated the temperature in each measurement point in Examples 1-4 and Comparative Example 1 which concern on one Embodiment of this invention. It is explanatory drawing which shows the result of having evaluated temperature distribution in Examples 2 and 3 and Comparative Examples 2 and 3 which concern on one Embodiment of this invention. It is explanatory drawing which shows the result of having evaluated the temperature in each measurement point in Example 2 and Comparative Example 2 which concern on one Embodiment of this invention. It is explanatory drawing which shows the result of having evaluated the temperature in each measurement point in Example 3 and Comparative Example 3 which concern on one Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described. Note that the present invention is not limited to this embodiment.

  FIG. 1 is an explanatory diagram showing an example of a cross section of a pipe structure 100 in which a flow control body 1 according to the present embodiment is arranged. FIG. 2 is an explanatory view showing an appearance of an example of the flow control body 1. FIG. 3 is an explanatory diagram showing an example of the porous plate 20 included in the flow control body 1.

  As shown in FIG. 1, the flow control body 1 is disposed inside a pipe structure 100 through which fluid flows. In the present embodiment, the tube structure 100 is a tubular structure having a hollow inside. In the example shown in FIG. 1, fluid flows in the tube structure 100 in the direction indicated by the arrow F (flow direction). The fluid is not particularly limited as long as it can flow inside the tube structure 100 such as gas or liquid.

  The tube structure 100 is not particularly limited as long as it is a tubular structure in which a fluid flows. That is, the pipe structure 100 can be, for example, a piping structure for transporting fluid. Further, the tube structure 100 can be, for example, a device through which fluid flows or a part thereof. In addition, in this embodiment, although the cross-sectional shape of the pipe structure 100 is circular, it is not restricted to this, For example, a polygon may be sufficient.

  The tube structure 100 includes a downstream portion 120 having a tube wall 132 that is heated or cooled to heat or cool a fluid, and an upstream portion 110 provided on the upstream side of the downstream portion 120. .

  That is, the tube wall 130 constituting the tube structure 100 has the tube wall 132 heated or cooled to heat or cool the fluid as a part of the downstream side in the longitudinal direction (that is, the flow direction). ing.

  In this embodiment, the tube wall 132 of the downstream part 120 is heated in order to heat the fluid which distribute | circulates the inside. That is, as shown in FIG. 1, a heating unit 140 for heating the tube wall 132 is provided on the outer periphery of the tube wall 132 of the downstream portion 120.

  Specifically, in the example illustrated in FIG. 1, the heating unit 140 is a heater having a heating wire 141 that generates heat when energized and a heat insulating material 142 that covers the heating wire 141. In the present embodiment, the heating unit 140 is disposed so as to cover the entire outer circumferential direction of the tube wall 132.

  In addition, when the tube wall 132 of the downstream part 120 is cooled in order to cool an internal fluid, the cooling part which consists of a cooling device etc. in which a refrigerant | coolant distribute | circulates an inside is arrange | positioned on the outer periphery of the said tube wall 132, for example. Is done.

  The downstream portion 120 may be filled with a filler through which a fluid can pass. The filler is used for any purpose such as removal of a predetermined substance contained in the fluid. When the downstream portion 120 is filled with the filler, for example, the upstream end of the downstream portion 120 (the boundary between the upstream portion 110 and the downstream portion 120) can be the upstream end of the filler.

  The upstream portion 110 is provided continuously to the upstream side of the downstream portion 120 in the longitudinal direction of the tube structure 100. The upstream part 110 is an area reserved for controlling in advance the flow of the fluid flowing into the downstream part 120 in the pipe structure 100.

  In the example shown in FIG. 1, the heating unit 140 is not provided on the tube wall 131 of the upstream portion 110. However, for example, a part of the downstream side of the tube wall 131 of the upstream portion 110 may be heated or cooled. That is, the pipe wall 131 of the upstream part 110 can be a part of the pipe wall 130 in which at least a part of the upstream side is not heated or cooled, for example. The tube wall 130 of the tube structure 100 is made of, for example, metal.

  The flow control body 1 is disposed in the upstream portion 110 of such a pipe structure 100. As shown in FIGS. 1 to 3, the flow control body 1 is disposed on the downstream side of the non-perforated plate 10 for guiding the flow of the fluid radially outward, and the flow of the fluid is arranged in the radial direction. And a perforated plate 20 dispersed therein.

In the present embodiment, the porous plate 20 is a disk in which a large number of holes 21 penetrating from one surface to the other surface are formed. As shown in FIG. 3, the porous plate 20 includes a plurality of circular holes 21 of the inner diameter D ₂₁ are regularly arranged. Specifically, in the example shown in FIG. 3, the numerous holes 21 are arranged in a lattice shape with constant center distances D ₂₂ and D ₂₃ .

  The porous plate 20 is made of metal, for example. Specifically, in the present embodiment, the perforated plate 20 is a punching metal. The perforated plate 20 is not particularly limited as long as it has a porous structure through which fluid can pass. For example, the perforated plate 20 may be a mesh structure such as expanded metal or wire mesh. Moreover, although the shape of the perforated plate 20 and the hole 21 is circular in this embodiment, it is not restricted to this, For example, each may be circular or a polygon independently.

  The non-perforated plate 10 does not have a structure through which fluid can pass like the above-described perforated plate 20. That is, in this embodiment, the non-perforated plate 10 is a disk that does not have any structure through which fluid can pass. The non-perforated plate 10 is made of metal, for example. In addition, although the shape of the non-perforated plate 10 is circular in this embodiment, it is not restricted to this, For example, a polygon may be sufficient.

  In the upstream portion 110 of the tube structure 100, the non-porous plate 10 is disposed on the upstream side, and the perforated plate 20 is spaced apart from the non-porous plate 10 and disposed on the downstream side thereof. That is, in the example shown in FIG. 1, the porous plate 20 is disposed adjacent to the downstream side of the non-porous plate 10, and other members are disposed between the porous plate 20 and the non-porous plate 10. Not.

  Here, as shown in FIG. 1, the non-perforated plate 10 is disposed so as to block the central portion of the upstream portion 110 in the radial direction (the direction crossing the flow direction). That is, the non-perforated plate 10 is disposed so as to block the flow of fluid in the central portion in the radial direction of the upstream portion 110. For this reason, the non-perforated plate 10 guides the fluid flow to the outer peripheral side of the non-perforated plate 10. Therefore, the fluid that has flowed into the upstream portion 110 first collides with the non-perforated plate 10 and flows from between the non-perforated plate 10 and the tube wall 131 of the upstream portion 110 to the downstream side.

The outer diameter D ₁₀ of the non-perforated plate 10 is not particularly limited as long as it is smaller than the inner diameter D ₁₁₀ of the upstream portion 110 and can flow the fluid flow radially outward. That is, the ratio D ₁₀ / D ₁₁₀ of the outer diameter D ₁₀ of the non-porous plate 10 to the inner diameter D ₁₁₀ of the upstream portion 110 can be set to 0.7 or more and 0.95 or less, for example, 0.8 or more, It is preferable to set it to 0.95 or less. Since the non-perforated plate 10 has the outer diameter D ₁₀ in the above-described range, the flow of the fluid can be effectively guided radially outward.

  In the present embodiment, the inner diameter and the outer diameter of the pipe structure 100 and the flow control body 1 mean a diameter for a circle, and representative dimensions (for example, an even number of other shapes) in a direction orthogonal to the flow direction. For a square, it means the length of the diagonal).

Height (length in the flow direction) H ₁₀ imperforate plate 10 is not particularly limited as long as it can be arranged the imperforate plate 10 in the upstream portion 110. That is, the ratio H ₁₀ / D ₁₀ of the height H ₁₀ of the non-perforated plate 10 to the outer diameter D ₁₀ of the non-perforated plate 10 can be set to 0.02 or less, for example, 0.0015 or more, 0. It can also be set to 02 or less.

  The perforated plate 20 is disposed in the central portion of the upstream portion 110 in the radial direction, like the non-porous plate 10. That is, the perforated plate 20 and the non-porous plate 10 are arranged in series in the flow direction of the upstream portion 110. More specifically, in the example shown in FIG. 1, the perforated plate 20 is disposed concentrically with the non-porous plate 10.

  Since the porous plate 20 has a porous structure as described above, the fluid flow can be appropriately dispersed in the radial direction. Therefore, a part of the fluid flowing in from the radially outer side of the non-porous plate 10 flows between the perforated plate 20 and the tube wall 131 of the upstream portion 110 and flows to the downstream side, and the other part is It collides with the perforated plate 20 and is dispersed in the radial direction, passes through the numerous holes 21 of the perforated plate 20 and flows downstream.

Outer diameter D ₂₀ of the porous plate 20 is not particularly limited as long as it is capable of dispersing the flow of fluid in the radial direction. That is, the ratio D ₂₀ / D ₁₁₀ of the outer diameter D ₂₀ of the porous plate 20 to the inner diameter D ₁₁₀ of the upstream portion 110 can be, for example, 0.8 or more and 1 or less, and 0.9 or more and 1 or less. It is preferable to do. By porous plate 20 has an outer diameter D ₂₀ of the above-described range, it is possible to effectively distribute the flow of fluid in the radial direction.

The outer diameter _{D 20} of the porous plate 20 is preferably the outer diameter _{D 10} or more non-porous plate 10. That is, the ratio D ₂₀ / D ₁₀ of the outer diameter D ₂₀ of the porous plate 20 to the outer diameter D ₁₀ of the non-porous plate ₁₀ is not particularly limited, but is preferably 1 or more and 1.5 or less, for example. More preferably, it is 1 or more and 1.1 or less. The outer diameter _{D 20} of the porous plate 20 may be larger than the outer diameter _{D 10} of the imperforate plate 10. In this case, the ratio D ₂₀ / D ₁₀ of the outer diameter D ₂₀ of the porous plate 20 to the outer diameter D ₁₀ of the non-porous plate ₁₀ is preferably, for example, more than 1 and 1.5 or less. More preferably, it is 1 or less. When the ratio D ₂₀ / D ₁₀ is in the above range, the fluid can be efficiently collided with the perforated plate 20 and the dispersion of the fluid in the radial direction by the perforated plate 20 can be effectively achieved.

The height H ₂₀ of the perforated plate 20 is not particularly limited as long as the perforated plate 20 can be disposed in the upstream portion 110. That is, the ratio H ₂₀ / D ₂₀ of the height H ₂₀ of the porous plate 20 to the outer diameter D ₂₀ of the porous plate 20 can be set to 0.02 or less, for example, 0.001 or more and 0.02 or less. It can also be.

As shown in FIG. 1, the non-porous plate 10 and the porous plate 20 can be arranged relatively close to each other. That is, for example, the ratio L ₁₂ / D ₁₀ of the distance L ₁₂ between the non-porous plate 10 and the porous plate 20 with respect to the outer diameter D ₁₀ of the non-porous plate 10 can be 0.3 or less. More specifically, the ratio L ₁₂ / D ₁₀ can be set to 0.06 or more and 0.3 or less, for example. When the ratio L ₁₂ / D ₁₀ is in the above range, dispersion of the fluid flow in the radial direction by the porous plate 20 can be effectively achieved.

The upstream portion 110 may be a relatively short limited area. That is, the ratio L ₁₁₀ / D ₁₁₀ of the length L ₁₁₀ of the upstream portion 110 to the inner diameter D ₁₁₀ of the upstream portion 110 can be, for example, 5 or less, and can also be 3 or less. More specifically, the ratio L ₁₁₀ / D ₁₁₀ can be, for example, not less than 0.2 and not more than 5, and can be not less than 0.3 and not more than 3.

As shown in FIG. 1, the non-perforated plate 10 can be arranged relatively close to the upstream end of the upstream portion 110. That is, the ratio L ₁ / D ₁₁₀ of the distance L ₁ between the upstream end of the upstream portion 110 and the non-perforated plate 10 with respect to the inner diameter D ₁₁₀ of the upstream portion 110 can be set to 0.2 or less, for example. .15 or less. More specifically, the ratio L ₁ / D ₁₁₀ can be, for example, 0.05 or more and 0.2 or less, or 0.07 or more and 0.15 or less.

As shown in FIG. 1, the perforated plate 20 can be disposed relatively close to the upstream end of the downstream portion 120 (that is, the downstream end of the upstream portion 110). That is, the ratio L ₂ / D ₁₁₀ of the distance L ₂ between the upstream end of the downstream portion 120 and the porous plate 20 with respect to the inner diameter D ₁₁₀ of the upstream portion 110 can be set to 0.05 or less, for example, 0.04 It can also be as follows. More specifically, the ratio L ₂ / D ₁₁₀ can be, for example, 0.01 or more and 0.05 or less, and can also be 0.02 or more and 0.04 or less.

The downstream part 120 extends further downstream from the downstream end of the upstream part 110. In the present embodiment, the inner diameter D ₁₂₀ of the downstream portion 120 is the same as the inner diameter D ₁₁₀ of the upstream portion 110. The inner diameter D ₁₂₀ of the downstream portion 120 is not limited to this, and the ratio D ₁₂₀ / D ₁₁₀ of the inner diameter D ₁₂₀ of the downstream portion 120 to the inner diameter D ₁₁₀ of the upstream portion ₁₁₀ is, for example, 0.7 to 1.3. It can be.

The length L ₁₂₀ of the downstream portion 120 is not limited particularly as long as it is suitable for heating the fluid. That is, the downstream part 120 can be a region longer than the upstream part 110, for example.

The downstream portion 120 heats the fluid flowing in from the upstream portion 110 by the heated tube wall 132. That is, in the downstream portion 120 includes a fluid temperature _{T in,} the tube wall 132 that has been heated to the temperature _{T in} a temperature higher than _{T h,} by the contact, the temperature _{T f} of the fluid is increased.

When the tube wall 132 is cooled in order to cool the fluid flowing through the tube wall 132, the downstream portion 120 cools the fluid flowing in from the upstream portion 110 by the cooled tube wall 132. To do. That is, in the downstream portion 120 includes a fluid temperature _{T in,} the tube wall 132 that has been cooled to the temperature _{T in} a temperature lower than _{T h,} by the contact, the temperature _{T f} of the fluid is lowered.

And the temperature _{T h} of the wall 132, the temperature _{T in} and, of the difference _(T h _{-T in)} of the fluid (the fluid flowing through the upstream portion 110) that comes to flow to the downstream portion 120 is not particularly limited, for example, It can be 10 degreeC or more, and can also be 50 degreeC or more.

Temperature _{T h} of the heated tube wall 132 may, for example, be a 100 ° C. or higher, can also be a 500 ° C. or higher.

  A method of arranging such a flow control body 1 in the pipe structure 100 is not particularly limited. FIG. 4 is an explanatory diagram showing an example of a structure for attaching the flow control body 1 to the pipe structure 100. FIG. 4 shows the flow control body 1 and the pipe structure 100 in plan view as viewed from the upstream side of the upstream portion 110.

  In the example shown in FIG. 4, a plurality (specifically) extending in the radial direction from the outer periphery of the non-porous plate 10 and the porous plate 20 to the tube wall 130 and connecting the non-porous plate 10 and the porous plate 20 to the tube wall 130 respectively Specifically, the flow control body 1 is fixed to the pipe structure 100 by three support members 160 and 161 provided at equal intervals in the circumferential direction.

  In addition, the attachment structure to the pipe structure 100 of the flow control body 1 is not restricted to this example. That is, for example, when a flange is formed on the upstream side of the upstream portion 110, one end is fixed to the flange and the other end is fixed to the non-perforated plate 10 and the perforated plate 20 and extends in the flow direction. By providing this support member, the flow control body 1 can be fixed to the pipe structure 100.

  FIG. 5 is an explanatory diagram showing another example of a cross section of the pipe structure 100 in which the flow control body 1 is arranged. In the example shown in FIG. 5, the flow control body 1 has a plurality of (specifically, three) perforated plates 20a, 20b, and 20c arranged in series in the fluid flow direction. That is, the flow control body 1 includes the most upstream porous plate 20a disposed on the most upstream side, the most downstream porous plate 20c disposed on the most downstream side, and an intermediate porous plate 20b disposed therebetween. Yes.

Part or all of the three porous plates 20a, 20b, and 20c can satisfy the above-described conditions of the porous plate 20 independently of each other. That is, for example, the outer diameters D _20a , D _20b , D _20c , the heights H _20a , H _20b , H _20c , and the distances L _12a , L _12b , L _12c with the non-perforated plate 10 are The above-mentioned ranges can be made independent of each other.

Specifically, for example, when the ratio L _12a / D ₁₀ of the distance L _12a between the non-porous plate 10 and the most upstream porous plate 20a with respect to the outer diameter D ₁₀ of the non-porous plate ₁₀ is in the above range, the most upstream The other porous plates 20b and 20c on the downstream side of the porous plate 20a are independently on the downstream side of the non-porous plate 10 with distances L _12b and L _12c that are within the above-mentioned range or outside the above-mentioned range. It may be arranged.

Further, for example, when the ratio L _12c / D ₁₀ of the distance L _12c between the non-porous plate 10 and the most downstream porous plate 20c with respect to the outer diameter D ₁₀ of the non-porous plate ₁₀ is in the above range, the most downstream porous plate Similarly, the other porous plates 20a and 20b on the upstream side of 20c may be arranged on the downstream side of the non-porous plate 10 with the distances L _12a and L _12b in the above-mentioned range.

In the example shown in FIG. 5, the non-perforated plate 10 and the three perforated plates 20a, 20b, 20c are arranged at equal intervals. However, the distance L _12a between the non-porous plate 10 and the most upstream porous plate 20a, the distance L _ab between the most upstream porous plate 20a and the intermediate porous plate 20b, and the distance L between the intermediate porous plate 20b and the most downstream porous plate 20c. The distance between the plurality of perforated plates 20 such as _bc is not limited to this, and can be set arbitrarily. In addition, when the flow control body 1 has a plurality of porous plates 20, the number of the porous plates 20 is not particularly limited as long as it is two or more.

In the example shown in FIG. 5, the pipe structure 100 is provided on the upstream side of the upstream portion 110, and has an inlet portion 150 through which fluid flows out, whose inner diameter D ₁₅₀ is smaller than the inner diameter D ₁₁₀ of the upstream portion 110. Have. That is, the fluid that has flowed out of the small-diameter inlet portion 150 flows into the large-diameter upstream portion 110 and collides with the flow control body 1.

The inner diameter _{D 150} of the inlet portion 150 is not particularly limited smaller than the inner diameter _{D 110} of the upstream portion 110. That is, the ratio D ₁₅₀ / D ₁₁₀ of the inner diameter D ₁₅₀ of the inlet port 150 with respect to the inner diameter D ₁₁₀ of the upstream portion 110 can be, for example, 0.5 or less, and can be 0.2 or less. More specifically, the ratio D ₁₅₀ / D ₁₁₀ can be, for example, 0.02 or more and 0.5 or less, and can be 0.05 or more and 0.2 or less.

Incidentally, if the tube structure 100 has such a inlet portion 150, a distance L ₁ between the upstream end and the non-perforated plate 10 in the upstream portion 110 described above, the downstream end and the of the inlet port 150 imperforate The distance L _{1 from the} plate 10 can be set. In addition, the flow control body 1 arranged in the pipe structure 100 having the inlet portion 150 is not limited to the one having the plurality of perforated plates 20, and has at least one perforated plate 10 and at least one perforated plate 20. That's fine.

  According to the flow control body 1 as described above, effective heating or cooling of the fluid can be realized in the tube structure 100 that heats or cools the fluid via the tube wall 130. That is, according to the flow control body 1, in the upstream portion 110, which is a limited region, the fluid flow is first biased radially outward by the non-perforated plate 10, and then the fluid flow is diametrically changed by the porous plate 20. By appropriately dispersing in the direction, it is possible to effectively form a flow suitable for heat exchange by contact between the pipe wall 132 and the fluid in the downstream portion 120.

  In particular, as shown in FIG. 5, in a rapidly expanding structure in which a fluid flows out from a small-diameter inlet portion 150 toward a large-diameter downstream portion 120, between the inlet portion 150 and the downstream portion 120. When the length of the provided upstream portion 110 is short, it is not easy to efficiently perform heat exchange between the tube wall 132 and the fluid in the downstream portion 120.

  In this regard, according to the flow control body 1, even in the sudden expansion structure in which the length of the upstream portion 110 is limited, the flow of the fluid is appropriately controlled as described above, and the tube wall 132 in the downstream portion 120 Efficient heat exchange with the fluid can be realized.

  Next, specific examples according to the present embodiment will be described.

The fluid flow control effects of the flow control bodies of Examples 1 to 4 and Comparative Examples 1 to 3 described later were evaluated by numerical simulation. As shown in FIG. 1, the pipe structure 100 is a cylindrical metal pipe that linearly extends with constant inner diameters D ₁₁₀ and D ₁₂₀ . That is, the pipe structure 100 includes an inlet portion 150 having an inner diameter D ₁₅₀ (D ₁₅₀ / D ₁₁₀ = 0.12), a downstream portion 120 having a length L ₁₂₀ (L ₁₂₀ / D ₁₂₀ = 2.6), Length (distance from the downstream end of the inlet portion 150 to the upstream end of the downstream portion 120) provided between the inlet portion 150 and the downstream portion 120 L ₁₁₀ (L ₁₁₀ / D ₁₁₀ = 2) , 82) upstream portion 110. The fluid that circulates inside the tube structure 100 was air.

The non-perforated plate 10 was a metal disk having an outer diameter D ₁₀ (D ₁₀ / D ₁₁₀ = 0.91) and a thickness H ₁₀ (H ₁₀ / D ₁₀ = 0.00923). The porous plate 20 has an outer diameter D ₂₀ (D ₂₀ / D ₁₁₀ = 0.93) and a thickness H ₂₀ (H ₂₀ / D ₂₀ = 0.00909). As shown in FIG. 3, the inner diameter D ₂₁ A plurality of holes 21 (D ₂₁ / D ₂₀ = 0.03) are formed in a lattice shape at a constant center distance D ₂₂ , D ₂₃ (D ₂₂ / D ₂₀ = D ₂₃ / D ₂₀ = 0.06). A round punching metal (PM) was used. Therefore, the ratio _D 20 _{/ D 10} of the outer diameter _{D 20} of the porous plate 20 to the outer diameter _{D 10} of the imperforate plate 10, was 1.02.

[Example 1: Disc x 1 + PM x 1]
In the upstream part 110, one non-perforated plate 10 is arranged on the downstream side from the inlet part 150 by a distance L ₁ (L ₁ / D ₁₁₀ = 0.067). In addition, a distance L ₁₂ (L ₁₂ / D ₁₀ = 0.25) downstream from the non-perforated plate 10 and a distance L ₂ upstream from the downstream portion 120 (L ₂ / D ₁₁₀ = 0.031) A perforated plate 20 was disposed.

[Example 2: Disc x 1 + PM x 2]
The non-perforated plate 10 was disposed at the same position as the non-perforated plate 10 of Example 1 described above. The most downstream porous plate 20 was disposed at the same position as the porous plate 20 of Example 1 described above. One porous plate 20 was further arranged at a position intermediate between the non-porous plate 10 and the most downstream porous plate 20.

[Example 3: Disc x 1 + PM x 3]
The non-perforated plate 10 was disposed at the same position as the non-perforated plate 10 of Example 1 described above. The most downstream porous plate 20 was disposed at the same position as the porous plate 20 of Example 1 described above. Two more porous plates 20 were arranged at equal intervals between the non-porous plate 10 and the most downstream porous plate 20.

[Example 4: Disc x 1 + PM x 4]
The non-perforated plate 10 was disposed at the same position as the non-perforated plate 10 of Example 1 described above. The most downstream porous plate 20 was disposed at the same position as the porous plate 20 of Example 1 described above. Three more porous plates 20 were arranged at equal intervals between the non-porous plate 10 and the most downstream porous plate 20.

[Comparative Example 1: Disc x 1]
The non-perforated plate 10 was disposed at the same position as the non-perforated plate 10 of Example 1 described above.

[Comparative Example 2: PM × 3]
The most upstream perforated plate 20 was disposed at the same position as the non-porous plate 10 of Example 1 described above. The most downstream porous plate 20 was disposed at the same position as the porous plate 20 of Example 1 described above. Further, one porous plate 20 was disposed at a position intermediate between the most upstream porous plate 20 and the most downstream porous plate 20.

[Comparative Example 3: PM × 4]
The most upstream perforated plate 20 was disposed at the same position as the non-porous plate 10 of Example 1 described above. The most downstream porous plate 20 was disposed at the same position as the porous plate 20 of Example 1 described above. Two more porous plates 20 were arranged at equal intervals between the most upstream perforated plate 20 and the most downstream perforated plate 20.

[Evaluation of temperature distribution]
The temperature T _h of the wall 132 of the downstream portion 120, and a predetermined value suitable to heat the fluid. Further, the temperature _{T in} the fluid coming flows into the upstream portion 110 from the inlet portion 150 in the case where the temperature _{T h} of the tube wall 132 and 1 to 0.27. And about the above-mentioned Examples 1-4 and Comparative Examples 1-3, common conditions (For example, thermal conductivity (W / m * K), such as a fluid, the non-perforated plate 10, the perforated plate 20, etc., and a pipe wall, A numerical calculation (finite volume method) applying a calorific value (W / m ² ), a flow rate (kg / s) of the fluid, etc.) was performed, and a temperature distribution of the fluid in the downstream portion 120 was obtained.

[Evaluation results]
6A, FIG. 6B, FIG. 6C, FIG. 6D, and FIG. 6E show the results of evaluating the temperature distribution in Comparative Example 1, Example 1, Example 2, Example 3, and Example 4, respectively. In FIG. 7, in Examples 1 to 4 and Comparative Example 1, the temperature T of the fluid obtained at 13 measurement points ((1) to (13) shown in FIGS. 6A to 6E) in the downstream portion 120. _f is indicated. 7, the horizontal axis represents the measuring points, the vertical axis represents the temperature T _f of the fluid at each measurement point for the temperature T _h of the wall 132 _(the temperature T _f in a case where the temperature T _h was ₁₎ relative Indicates temperature (-). In FIG. 7, black circles indicate the results of Comparative Example 1, white circles indicate the results of Example 1, white diamonds indicate the results of Example 2, and white squares. The mark shows the result of Example 3, and the white triangle mark shows the result of Example 4.

  As shown in FIGS. 6A and 7, in Comparative Example 1 in which only the non-porous plate 10 was arranged and the porous plate 20 was not arranged, the temperature of the fluid in the downstream portion 120 became extremely uneven. That is, in Comparative Example 1, the temperature of the fluid is remarkably lowered at a part of the downstream portion 120 (particularly, the measurement points (11), (12), and (13)), and the fluid cannot be heated efficiently. It was.

  On the other hand, as shown in FIGS. 6B to 6E and 7, the temperature of the fluid in the downstream portion 120 is effectively equalized by disposing the porous plate 20 on the downstream side of the non-porous plate 10. I was able to. And by increasing the number of the perforated plates 20, the temperature of the fluid in the downstream part 120 could be more effectively uniformized within a range closer to the target temperature.

  8A, 8B, 8C, and 8D show the results of evaluating the temperature distribution in Comparative Example 2, Example 2, Comparative Example 3, and Example 3, respectively. 8B and 8D show the same results as in FIGS. 6C and 6D, respectively.

9A shows the temperature T _f of the fluid obtained at 13 measurement points ((1) to (13) shown in FIGS. 8A and 8B) in the downstream portion 120 in Example 2 and Comparative Example 2. FIG. Show. FIG. 9B shows the temperature T _f of the fluid obtained at 13 measurement points ((1) to (13) shown in FIGS. 8C and 8D) in the downstream portion 120 in Example 3 and Comparative Example 3. Show. 9A and 9B, the horizontal axis indicates the measurement point, and the vertical axis indicates the relative temperature (−) of the fluid at each measurement point, as in FIG. 7 described above. In FIG. 9A, white circles indicate the results of Comparative Example 2, and black circles indicate the results of Example 2. In FIG. 9B, white circles indicate the results of Comparative Example 3, and black circles indicate the results of Example 3.

  As shown in FIGS. 8A and 9A, in Comparative Example 2 in which only the perforated plate 20 was arranged without arranging the non-porous plate 10, the temperature of the fluid in the downstream portion 120 became extremely uneven. That is, in Comparative Example 2, the temperature of the fluid was remarkably lowered at many measurement points in the downstream portion 120, and the fluid could not be efficiently heated.

  On the other hand, as shown in FIG. 8B and FIG. 9A, in Example 2 in which the non-perforated plate 10 is arranged at the most upstream position and the two porous plates 20 are arranged on the downstream side, in the downstream portion 120. The temperature of the fluid could be effectively equalized in a range close to the target temperature.

  Similarly, as shown in FIGS. 8C and 9B, in Comparative Example 2 in which only the perforated plate 20 is arranged without arranging the non-perforated plate 10, the temperature of the fluid in the downstream portion 120 becomes extremely uneven. .

  On the other hand, as shown in FIG. 8D and FIG. 9B, in Example 3 in which the non-perforated plate 10 is disposed at the most upstream position and the two porous plates 20 are disposed on the downstream side thereof, in the downstream portion 120. The temperature of the fluid could be effectively equalized in a range close to the target temperature.

  DESCRIPTION OF SYMBOLS 1 Flow control body, 10 Non-perforated plate, 20, 20a, 20b, 20c Perforated plate, 21 holes, 100 pipe structure, 110 upstream part, 120 downstream part, 130 pipe wall, 131 upstream pipe wall, 132 downstream part Tube wall, 140 heating section, 141 heating wire, 142 heat insulating material, 150 inlet section, 160, 161 support member.

Claims (7)

A flow control body disposed inside a pipe structure through which fluid flows,
A non-perforated plate for guiding the flow of the fluid radially outward;
A perforated plate disposed downstream of the non-perforated plate and spaced apart from the non-perforated plate to disperse the fluid flow in the radial direction;
And the outer diameter of the perforated plate is equal to or greater than the outer diameter of the non-porous plate,
The non- porous plate and the perforated plate are fixed to the tube structure with a support member. The flow control body according to claim 1 , wherein a ratio of a distance between the non-porous plate and the porous plate with respect to an outer diameter of the non-porous plate is 0.06 or more and 0.3 or less. By flow control body according to claim 1 or 2, wherein a plurality of the perforated plates which are arranged in series in the flow direction of the fluid. Arranged in the upstream portion of the tube structure having a downstream portion having a tube wall heated or cooled to heat or cool the fluid, and an upstream portion provided upstream of the downstream portion. The flow control body according to any one of claims 1 to 3 , wherein The flow control body according to claim 4 , wherein a ratio of an outer diameter of the non-perforated plate to an inner diameter of the upstream portion is 0.7 or more and 0.95 or less. The flow control body according to claim 4 or 5 , wherein a ratio of a length of the upstream portion to an inner diameter of the upstream portion is 3 or less. The tube structure is provided on the upstream side of the upstream portion, smaller than the inner diameter of an inner diameter the upstream portion, any one of claims 4 to 6, characterized in that it has an inlet portion into which the fluid flows out The flow control body described in 1.

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