JP6538403B2 - Wind tunnel test apparatus and method with model preparation function - Google Patents

Description

  The present invention relates to a wind tunnel test apparatus with a model preparation function and a wind tunnel test method using the same.

  Wind tunnel experiments in the construction field are conducted using a reduced model that faithfully reproduces the situation of the structure and surrounding urban area and surrounding topography. These models are manufactured to be installed on a turntable installed in the wind tunnel measurement unit, and are generally carried into the wind tunnel together with the turntable, and model-made turns manufactured by a model maker's factory After carrying the table to the wind tunnel facility with a truck etc., it will be installed in the wind tunnel.

On the other hand, the wind tunnel facility is provided with a traverse device capable of moving the measurement sensor three-dimensionally in the wind tunnel. A method of producing a city area model (see Patent Document 1) and a method of producing a topography model (see Patent Document 2) using this traverse device have been proposed.
That is, in Patent Document 1, the urban area is reproduced by closely standing the needle-like member on the turn table with a dot machine set in the traverse device.
Further, in Patent Document 2, the topography is reproduced by means for cutting and fixing a block placed on a turntable by means of a cutting means set in a traverse device.

JP 9-134119 A Japanese Patent Application Laid-Open No. 10-160618

As in the past, in order to carry the wind tunnel test model manufactured in a factory etc. into the wind tunnel facility and install it in the wind tunnel measurement part, a lot of labor and time are required for transportation by truck etc. I need it.
In addition, the production of a wind tunnel experimental model requires special skills and skill levels, and there are few vendors that can produce it, and it takes time for delivery.

And in the preparation method of the city area model using the traverse device of patent documents 1, the needlelike member which made the height match is put in order, and a precise field can not be prepared.
Further, in the method of producing a topography model using the traverse device of Patent Document 2, there is a problem of accuracy and cutting powder due to cutting of a block, and faithful reproduction of a shape is difficult.

  An object of the present invention is to make it possible to produce a model having a faithful shape without problems such as generation of cutting powder in a wind tunnel test apparatus with a model production function so that a highly accurate wind tunnel test can be performed.

In order to solve the above problems, the invention according to claim 1 is:
With the wind tunnel,
A table disposed in the wind tunnel on which a model is placed;
A traverse device disposed in the wind tunnel, movable in forward and backward, left and right and up and down directions, and capable of moving a measurement sensor to an arbitrary position on the table;
A three-dimensional wind tunnel including various buildings in a city area as the model on the table by laminating three-dimensional data which is detachably attached to the traverse device and created on a computer as a design drawing and laminating sectional shapes And a three-dimensional printer capable of producing an experimental model .

The invention according to claim 2 is
A wind tunnel test apparatus with a model preparation function according to claim 1, wherein
A wind pressure measurement hole is formed on the surface of the model by the three-dimensional printer.

The invention according to claim 3 is
A wind tunnel test apparatus with a model preparation function according to claim 2, wherein
It is characterized in that a wind pressure transmitting tube disposed in the model is connected to the wind pressure measurement hole.

The invention according to claim 4 is
A wind tunnel test apparatus with a model preparation function according to any one of claims 1 to 3 ,
A model is produced on the table by the three-dimensional printer, which is detachably attached to the traverse device and three-dimensional data created on the computer as a design drawing, is made removable from the traverse device from the traverse device. It is characterized in that a wind tunnel test is performed on the model after removing the three-dimensional printer .

The invention according to claim 5 is
A wind pressure measurement hole is formed on the surface of the model by the three-dimensional printer, and a wind pressure transmission tube disposed in the model is connected to the wind pressure measurement hole.
A wind pressure transmitted through the wind pressure transmission tube from the wind pressure measurement hole is measured.

  According to the present invention, in a wind tunnel test apparatus with a model manufacturing function, a model having a faithful shape can be manufactured without problems such as generation of cutting powder, and a wind tunnel test with high accuracy can be performed.

It is a schematic perspective view which shows the structure of one Embodiment in the wind-tunnel experiment apparatus to which this invention is applied. It is the figure which illustrated the traverse apparatus, the turntable, and the model. It is an enlarged view of the turntable of FIG. 2, and a model. It is the perspective view which showed the wind pressure measurement hole of the model surface. It is the perspective view which showed the tube for wind pressure transmission under a turntable. It is a block block diagram which shows the measuring instrument from the pressure sensor connected to the tube for wind pressure transmission.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment)
1 and 2 show the configuration of an embodiment in a wind tunnel test apparatus to which the present invention is applied, 1 is a wind tunnel, 2 is a block, 3 is a turntable, 4 is a traverse device, 5 is a three-dimensional printer, 11 is a model.

As illustrated, on the floor of the wind tunnel 1, a large number of blocks 2 are installed, and a turnable turntable 3 is installed.
A traverse device 4 is installed on the ceiling of the wind tunnel 1.

  The traverse device 4 includes a first slider 4X movable along the front-rear direction indicated by the arrow X, and a second slider 4Y assembled movably along the left-right direction indicated by the arrow Y with respect to the first slider 4X. And a lift rod 4Z movably assembled in the vertical direction indicated by the arrow Z with respect to the second slider 4Y. A wind speed measurement sensor (not shown) is attached to the lower end of the lift rod 4Z.

In the above-described wind tunnel test apparatus, the three-dimensional printer 5 is detachable from the traverse device 4.
That is, the three-dimensional printer 5 is attachable to and detachable from the lower end of the lift rod 4Z of the traverse device 4, and can be connected to the personal computer 16 (see FIG. 6) that controls the wind tunnel test apparatus.

  The three-dimensional printer 5 can produce three-dimensional objects including hollow shapes and complex internal shapes by laminating cross-sectional shapes by using three-dimensional data created on a computer such as a personal computer 16 as a design drawing. it can.

  Therefore, the operation of the three-dimensional printer 5 attached to the lower end of the elevation rod 4Z is accompanied by the movement of the elevation rod 4Z of the traverse device 4 in the directions of arrows X, Y and Z based on the operation of the personal computer 16. A three-dimensional wind tunnel test model 11 including various buildings in a city area can be produced on the table 3 as shown in an enlarged manner also in FIG.

FIG. 4 shows the wind pressure measurement holes 11h of the model building surface of the wind tunnel test model 11. The three-dimensional printer 5 makes the model building into a hollow shape and at the same time the wind pressure measurement holes on the model building surface. 11h is also formed.
Thereafter, the three-dimensional printer 5 is removed from the lower end of the lifting rod 4Z.

  FIG. 5 shows the wind pressure transmission tube 12 under the turntable 3. One end of the wind pressure transmission tube 12 is connected to the wind pressure measurement hole 11h in the hollow shape of the model building, and the other end is connected to the other end. The pressure sensor 13 (see FIG. 6) is connected.

FIG. 6 is a block diagram showing a measuring device from the pressure sensor 13 connected to the wind pressure transfer tube 12. As shown, the analog information measured by the pressure sensor 13 is analog filter 14, A / D conversion It passes through the unit 15 and is taken into the personal computer 16 as digital information.
The analog information measured by the sensor for measuring the wind speed (not shown) at the lower end of the lifting rod 4Z is similarly taken into the personal computer 16 as digital information through the analog filter 14 and the A / D converter 15.

  As described above, according to the wind tunnel test apparatus with a model production function of the embodiment, after the wind tunnel test model 11 is produced on the turntable 3 by the three-dimensional printer 5 attached to the lower end of the lift rod 4Z of the traverse device 4, Since the wind tunnel test is performed on the wind tunnel test model 11, the wind tunnel test model 11 having a faithful shape can be manufactured without problems such as generation of cutting powder, and the wind tunnel test can be performed with high accuracy.

  That is, by manufacturing the wind tunnel experimental model 11 by the traverse device 4 provided with the three-dimensional printer 5, labor of transportation of the model and installation in the wind tunnel measurement unit can be reduced, and the time can be shortened.

  Moreover, since the three-dimensional printer 5 can faithfully reproduce the shape based on the CAD drawing, no special technology or skill in the manufacture of the wind tunnel experimental model 11 is required, and anyone can easily achieve the desired shape. You can make a model.

  Furthermore, in the three-dimensional printer 5, flat and curved surfaces can be faithfully reproduced according to CAD data, and the influence of the conditions such as air entering and leaving and the building shape on the flow approaches the actual flow, and the wind tunnel test accuracy is improved.

In the wind tunnel test, the wind pressure on the surface of the building is measured by transmitting it from the wind pressure measurement hole 11 h provided on the surface of the building model to the pressure sensor 13 via the wind pressure transmitting tube 12 inside the model.
In that case, if the pressure measurement hole 11 h and the tube 12 for transmitting the wind pressure are expressed in the CAD drawing, an experimental model for measuring the wind pressure can be easily produced.

  Further, the traverse device 4 having a three-dimensional printer function cooperates with the CAD drawing, and when the measurement sensor is attached to the traverse device 4, measurement can be performed in a portion designated by the CAD drawing.

(Modification)
Other than the above embodiments, it is needless to say that specific detailed structures and the like such as the shape of a model can be appropriately changed.

Reference Signs List 1 wind tunnel 2 block 3 turn table 4 traverse device 4X first slider 4Y second slider 4Z elevating rod 5 three-dimensional printer 11 model 11h wind pressure measurement hole 12 wind pressure transmission tube

Claims (5)

With the wind tunnel,
A table disposed in the wind tunnel on which a model is placed;
A traverse device disposed in the wind tunnel, movable in forward and backward, left and right and up and down directions, and capable of moving a measurement sensor to an arbitrary position on the table;
A three-dimensional wind tunnel including various buildings in a city area as the model on the table by laminating three-dimensional data which is detachably attached to the traverse device and created on a computer as a design drawing and laminating sectional shapes And a three-dimensional printer capable of preparing an experimental model .   The wind tunnel test apparatus with a model preparation function according to claim 1, wherein a wind pressure measurement hole is formed on the surface of the model by the three-dimensional printer.   The wind tunnel test apparatus with a model preparation function according to claim 2, wherein a wind pressure transmission tube disposed in the model is connected to the wind pressure measurement hole. A wind tunnel test apparatus with a model preparation function according to any one of claims 1 to 3,
A model is produced on the table by the three-dimensional printer, which is detachably attached to the traverse device and three-dimensional data created on the computer as a design drawing, is made removable from the traverse device from the traverse device. A wind tunnel test method characterized in that a wind tunnel test is performed on the model after removing the three-dimensional printer . A wind pressure measurement hole is formed on the surface of the model by the three-dimensional printer, and a wind pressure transmission tube disposed in the model is connected to the wind pressure measurement hole.
The wind tunnel test method according to claim 4, wherein the wind pressure transmitted from the wind pressure measurement hole through the wind pressure transmission tube is measured.

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