JP6074804B2 - Wave wind resistance increase reducing device and ship - Google Patents

Description

  The present invention relates to a wave wind resistance increase / reduction device that reduces a resistance that increases when a wave level rising portion extends backward by wind.

With reference to FIG. 5, the increase in resistance in the wind due to the wind will be described.
FIG. 5 is a side view of an essential part of a ship for explaining an increase in resistance in wave wind due to wind.
FIG. 5 (a) shows the state of waves in an environment without wind, and FIG. 5 (b) shows the state of waves in an environment with wind.
In the figure, the water surface 1 shows when the ship is stopped. When the ship moves, the water surface 2 rises due to the static water level rise even in the absence of waves. On the water surface 3 where there is a wave, the water level rising portion 4 rises above the water surface 3 along the hull 10 and fluctuates up and down due to the dynamic water level rise.
Under an environment where there is wind, the water level raising portion 4 extends rearward of the hull 10 as shown as a water level raising portion 4a in FIG. As a result, the flooded surface area in the hull 10 increases.
Thus, when the wave and the wind coexist as compared with the case of the wave alone, the resistance increase in the wave becomes large.

FIG. 6 is a graph showing the influence of wave and wind interference obtained by the model test.
In FIG. 6, the horizontal axis indicates the wind speed, and the vertical axis indicates the resistance increase amount. The experiment was conducted at λ / L = 0.3 where λ is the wavelength of the wave and L is the length of the ship.
As shown in the figure, it can be seen that the resistance increase amount is proportionally increased as the wind speed is increased.

In Patent Document 1, a ship is described in which a current plate extending in the stern direction is arranged on the side surface of the bow portion. This rectifying plate is disposed so as to be inclined such that the front side is high and the rear side is low (see FIG. 5B).
Moreover, in patent document 2, the ship which has arrange | positioned the wave deflection | deviation member in the bow part is described.
Patent Document 3 proposes a ship intended to prevent the wind waves from affecting the hull.

JP 2012-17089 A JP 2012-162116 A Japanese Utility Model Publication No. 5-16582

The current plate described in Patent Document 1 guides the water flow that flows along the side surface of the hull, and effectively receives the water flow backward.
The wave deflecting member described in Patent Literature 2 is provided from the dispersion surface of the wave dispersing member to the right side wall and the left side wall of the ship, thereby changing the wave flow received from below to the left and right rear.
Patent Document 3 is common in that it focuses on the influence of the wind on the hull, but it is a problem when it receives a crosswind on the hull, and a wind wave flow distribution hole serving as a crosswind flow path is provided on the hull. is there.
As described above, none of the above-mentioned Patent Documents 1 to 3 relates to a technique for reducing an increase in resistance in wave wind due to wind.

  It is an object of the present invention to provide a wave wind resistance increase / reduction device and a ship that reduce a resistance that increases when a wave level rise portion extends backward by wind.

  The wave wind resistance increase / reduction device corresponding to the present invention according to claim 1 further comprises a water level rise suppression means for causing the wind flowing around the hull to act on the water level rise portion during navigation in the vicinity of the bow of the hull. It is characterized by reducing the increase in resistance of the hull. According to the first aspect of the present invention, since the wind flowing around the hull acts on the water level raising portion, the rise of the water level in the wave wind can be suppressed and the submerged surface area in the hull can be reduced. Can be reduced.

  According to a second aspect of the present invention, in the wave wind resistance increase / reduction device according to the first aspect, the water level rise suppression means is a fin type means that acts on the water level rise portion by changing the wind direction, and the fin type means is used for the hull. It is provided at the bow. According to the second aspect of the present invention, it is possible to change the wind direction without resistance by the fin-type means to suppress the rise of the water level, and it is possible to reduce the seawater driving to the deck.

  According to a third aspect of the present invention, in the wave wind resistance increase / reduction device according to the second aspect, the angle of attack of the fin-type means with respect to the wind flow is variable. According to this invention of Claim 3, the raise of a water level can be suppressed according to a condition by changing an angle of attack according to the strength of a wind.

  According to a fourth aspect of the present invention, in the wave wind resistance increase / reduction device according to the third aspect, the apparatus further comprises wind measuring means for detecting a wind state, and the angle of attack is in accordance with the measurement result of the wind state by the wind measuring means. It is characterized by controlling. According to the fourth aspect of the present invention, by changing the angle of attack according to the measured wind state, it is possible to follow the change in the situation and suppress the rise in the water level.

  According to a fifth aspect of the present invention, in the wave wind resistance increase / reduction device according to the first aspect, the water level rise suppression means is a flap type means that changes the wind direction to act on the water level rise portion, and the flap type means is the hull of the hull. It is provided at the bow. According to the fifth aspect of the present invention, by forcibly changing the wind direction by the flap type means, it is possible to suppress the rise of the water level in the wave wind and to reduce the seawater driving into the deck. .

  According to a sixth aspect of the present invention, in the wave wind resistance increase / reduction apparatus according to the fifth aspect, the flap type means has a variable flap angle. According to this invention of Claim 6, the raise of a water level can be suppressed according to a condition by changing a flap angle according to the strength of a wind.

  According to a seventh aspect of the present invention, in the wave wind resistance increase / reduction device according to the sixth aspect, the wind measuring means for detecting the wind state is provided, and the flap angle is determined according to the measurement result of the wind state by the wind measuring means. It is characterized by controlling. According to the seventh aspect of the present invention, by changing the flap angle according to the measured wind state, it is possible to follow the change in the situation and suppress an increase in the water level.

  The invention according to claim 8 is the wave wind resistance increase / reduction device according to claim 1, wherein the water level rise suppression means is a duct type means that takes in wind and blows out and acts on the water level rise portion, and the duct type means is a hull. It is provided in the bow part of this. According to the eighth aspect of the present invention, it is possible to suppress the rise of the water level in the wave wind by taking in the wind by the duct type means and blowing the wind out to the water level raising portion.

  According to a ninth aspect of the present invention, in the wave wind resistance increase / reduction device according to the eighth aspect, the duct type means has a blowout port in which at least one of the wind direction and the wind speed is variable. According to the ninth aspect of the present invention, since the wind can be blown out to the water level rising portion that fluctuates according to the strength of the wind, the rise in the water level can be suppressed according to the situation.

  According to a tenth aspect of the present invention, there is provided the wave wind resistance increasing / reducing device according to the ninth aspect, further comprising wind measuring means for detecting a wind state, and the air outlet according to the measurement result of the wind state by the wind measuring means. Controlling at least one of the wind direction and the wind speed from According to the tenth aspect of the present invention, by changing the wind direction and the wind speed according to the measured wind state, it is possible to follow the change in the situation and suppress the rise in the water level.

  The invention according to claim 11 is the wave wind resistance increase / reduction device according to any one of claims 8 to 10, wherein the duct-type means includes an intake port disposed at a front portion of a bolster provided in the hull. It is characterized by having. According to the eleventh aspect of the present invention, the resistance can be reduced by reducing the wind flowing into the bolster.

  A twelfth aspect of the present invention is the wave wind resistance increase / reduction device according to any one of the first to eleventh aspects, wherein a plurality of water level rise suppression means are provided on each of the left and right sides of the hull. . According to this invention of Claim 12, the raise of a water level can be suppressed effectively with respect to especially strong wind.

  According to a thirteenth aspect of the present invention, in the wave wind resistance increase / reduction device according to the first aspect, a plurality of water level rise suppression means are provided on each of the left and right sides of the hull, and the water level rises by changing the wind direction as the water level rise suppression means That at least two different means are used among the fin type means that acts on the water level, the flap type means that acts on the water level rising part by changing the wind direction, and the duct type means that takes the wind and blows it on the water level rising part. Features. According to the present invention as set forth in claim 13, it is possible to select a combination of water level rise suppression means suitable for the ship type, application, and hull structure, and it is possible to effectively suppress the rise of the water level in wave winds. .

  According to a fourteenth aspect of the present invention, in the wave wind resistance increase / reduction device according to any one of the first to thirteenth aspects, the water level rise suppressing means can be stored in the hull. According to this invention of Claim 14, when a wave is so big that it reaches | attains a water level rise suppression means, damage to a water level rise suppression means can be prevented by storing a water level rise suppression means.

  According to a fifteenth aspect of the present invention, there is provided a ship corresponding to the present invention, wherein the wave wind resistance increase / reduction device according to any one of the first to fourteenth aspects is provided. According to the present invention of the fifteenth aspect, it is possible to provide a ship that can reduce an increase in resistance of the hull due to wind flowing around the hull.

  According to the present invention, by causing the wind flowing around the hull to act on the water level raising portion, it is possible to suppress the rise of the water level in the wave wind and to reduce the flooded surface area in the hull, thereby reducing the increase in resistance of the hull.

  In addition, when the water level rise suppressing means is a fin type means that changes the wind direction and acts on the water level raising portion, and the fin type means is provided at the bow of the hull, the wind direction is changed without resistance by the fin type means to change the water level. As well as being able to suppress the rise, it is also possible to reduce seawater driving on the deck.

  Further, when the angle of attack with respect to the wind flow is variable in the fin type means, the elevation of the water level can be suppressed according to the situation by changing the angle of attack according to the strength of the wind.

  In addition, when equipped with wind measurement means that detects the wind condition and controls the angle of attack according to the measurement result of the wind condition by the wind measurement means, the angle of attack is changed according to the measured wind condition Thus, the rise in the water level can be suppressed following the situation change.

  In addition, when the water level rise suppression means is a flap type means that changes the wind direction and acts on the water level rise part, and the flap type means is provided at the bow of the hull, the wind direction can be forcibly changed by the flap type means. In addition, it is possible to suppress the rise of the water level in the wave wind and to reduce the seawater driving to the deck.

  Further, when the flap angle of the flap type means is variable, the rise of the water level can be suppressed according to the situation by changing the flap angle according to the strength of the wind.

  In addition, when a wind measuring means for detecting the wind condition is provided and the flap angle is controlled according to the measurement result of the wind condition by the wind measuring means, the flap angle is changed according to the measured wind condition. Thus, the rise in the water level can be suppressed following the situation change.

  Further, when the water level rise suppression means is a duct type means that takes in wind and blows out and acts on the water level rise part, and the duct type means is provided at the bow part of the hull, the wind is taken in by the duct type means, and the water level rise part The rise of the water level in the wave wind can be suppressed by blowing out the wind.

  In addition, when the duct type means has a blowout port in which at least one of the wind direction and the wind speed is variable, the wind can be blown to the water level rising portion that varies according to the strength of the wind. Accordingly, the rise in water level can be suppressed.

  In addition, when the wind measuring means for detecting the wind state is provided and at least one of the wind direction and the wind speed from the outlet is controlled according to the measurement result of the wind state by the wind measuring means, the measured wind state By changing the wind direction and wind speed according to the situation, it is possible to keep up with changes in the situation and suppress the rise in water level.

  Further, when the duct type means has an intake port arranged at the front part of the bolster provided in the hull, resistance can be reduced by reducing the wind flowing into the bolster.

  Further, when a plurality of water level rise suppression means are provided on the left and right sides of the hull, the rise in the water level can be effectively suppressed against particularly strong winds.

  Further, a plurality of water level rise suppression means are provided on each of the left and right sides of the hull, and as the water level rise suppression means, fin type means for changing the wind direction to act on the water level raising part, flap type means for changing the wind direction to act on the water level raising part In the case of using at least two different means from among the duct-type means that take in wind and blow out and act on the water level riser, a combination of water level rise suppression means suitable for the ship type, application, and hull structure is used. It can be selected and the rise of the water level in the wave wind can be suppressed more effectively.

  In addition, when the water level rise suppression means can be stored in the hull, damage to the water level rise suppression means can be prevented by storing the water level rise suppression means when the wave is large enough to reach the water level rise suppression means. Can do.

  ADVANTAGE OF THE INVENTION According to this invention, the ship which can reduce the increase in resistance of the hull by the wind which flows around a hull can be provided.

The principal part schematic block diagram which shows the resistance increase reduction apparatus in wave wind by Embodiment 1 of this invention In the wave wind resistance increase reduction device according to Embodiment 2 of the present invention, a schematic configuration diagram of the main part showing when the flap type means is extended. In the wave wind resistance increase / reduction device according to the same embodiment, the main part schematic configuration diagram showing when the flap type means is stored Main part schematic block diagram which shows the resistance increase reduction apparatus in wave wind by Embodiment 3 of this invention Side view of the main part of the ship to explain the increase in drag in the wind due to wind Graph showing the effect of wave and wind interference

Below, the resistance increase reduction apparatus in a wave wind by embodiment of this invention is demonstrated.
FIG. 1 is a schematic configuration diagram of a main part illustrating a wave wind resistance increase / reduction apparatus according to Embodiment 1 of the present invention.
In the wave wind resistance increase / reduction device according to the first embodiment, the water level rise suppression means 20 that acts on the water level riser 4 by changing the wind direction is a fin-type means 21.

The fin type means 21 is provided on the bow portion 11 of the hull 10. The fin type means 21 is arranged in a range H from the bow Fp (bow draining portion). The range H is within 5% of the captain Lpp for a normal ship, and within 10% of the captain Lpp even if a specially shaped ship is included.
The fin type means 21 is attached above the water surface where the water level rises and above the water level raising part 4 predicted during navigation. The fin-type means 21F on the front side of the hull 10 is disposed above the fin-type means 21R on the rear side. It should be noted that the arrangement position of the fin-type means 21F on the front side and the fin-type means 21R on the rear side can be expected to be as close as possible to the water level rising portion 4 predicted at the time of navigation, but assuming that the wave is large, It is preferable to arrange with some allowance. Moreover, it is preferable that the upper limit of arrangement | positioning is below a bolster and a flare, since the effect of the rise suppression of a water level is not impaired.

The fin type means 21 causes the wind flowing around the hull 10 to act on the water level rising portion 4 at the time of navigation in the vicinity of the bow Fp of the hull 10, thereby reducing the increase in resistance of the hull 10 in the wave wind. The wind that flows around the hull 10 includes natural wind in addition to the wind that accompanies the navigation of the ship.
The fin type means 21 includes a fin 21a having a wing-shaped cross section, a rotating shaft 21b that makes the angle of attack of the fin 21a variable, and an upper stopper 21c and a lower stopper 21d that regulate the position of the fin 21a.
The fin type means 21 can change the angle of attack of the fin 21a by the rotation shaft 21b. Further, the fin type means 21 can change the angle of attack of the fin 21a within a range regulated by the upper stopper 21c and the lower stopper 21d.

Although not shown, the fin-type means 21 is preferably configured to be stored in the hull 10. Further, the upper stopper 21c and the lower stopper 21d may be members or mechanisms that are provided in the hull 10 without being exposed and restrict the movement of the rotating shaft 21b.
Further, although the fin type means 21 are provided on the left and right sides of the hull 10, three or more fin type means 21 may be provided on each of the left and right sides, or only one fin type means 21 may be provided.

The wave wind resistance increase / reduction device according to the first embodiment includes the wind measuring unit 30 that detects the wind state, and preferably controls the angle of attack of the fins 21a according to the measurement result of the wind state by the wind measuring unit 30. . That is, it is horizontal when the wind speed is low, and tilted so that the rear part of the fin 21a is downward when the wind speed is high. Further, the angle of attack is changed so that the wind flows through the water level raising portion 4 according to the magnitude of the wind speed. The wind measuring means 30 may measure the wind direction in addition to the wind speed. Moreover, the change of a wind speed and the change of a wind direction may be measured.
When the wind direction is measured by the wind measuring means 30 and the direction of the wind direction and the direction of the bow Fp does not coincide with each other, the angle of attack of the fins 21a provided on the left and right sides of the hull 10 may be controlled separately according to the wind speed.

  According to the wave wind resistance increase / reduction device according to the first embodiment, the fin type means 21 can change the wind direction without resistance to suppress the rise of the water level, and the seawater to the deck that increases particularly when the wave is rough at the bow 11. Driving can be reduced by the fin type means 21.

  According to the wave wind resistance increase / reduction device according to the first embodiment, the fin-type means 21 can change the angle of attack according to the strength of the wind by changing the angle of attack with respect to the wind flow. The rise of the water level can be suppressed.

Further, according to the wave wind resistance increase / reduction device according to the first embodiment, the wind measuring unit 30 that detects the wind state is provided, and the angle of attack is controlled according to the measurement result of the wind state by the wind measuring unit 30. By changing the angle of attack according to the measured wind conditions, it is possible to follow the change in the situation and suppress the rise in the water level. By measuring and controlling the change in the wind, the elevation angle can be controlled in accordance with the change in the wind and the rise in the water level can be suppressed more accurately.
Further, when the wave is large enough to destroy the fin-type means 21, in the case of a storable configuration, the fin-type means 21 can be stored in the hull 10 to avoid damage.

2 and 3 are schematic configuration diagrams of a main part illustrating a wave wind resistance increase / reduction device according to Embodiment 2 of the present invention.
2 (a) is a side view of the main part showing the flap-type means being extended, FIG. 2 (b) is a top view of the main part, FIG. 2 (c) is a front view of the main part, and FIG. The principal part side view which shows the time of storing of a flap type means, FIG.3 (b) is the principal part front view.
In the wave wind resistance increase / reduction device according to the second embodiment, the water level rise suppression means 20 that acts on the water level riser 4 by changing the wind direction is a flap type means 22.

The flap type means 22 is provided in the bow 11 of the hull 10. The flap type means 22 is arranged in a range H from the bow Fp (bow draining part). The range H is within 5% of the captain Lpp for a normal ship, and within 10% of the captain Lpp even if a specially shaped ship is included.
The flap type means 22 is attached above the water surface where the water level rises and above the water level raising part 4 predicted during navigation. The flap type means 22F on the front side of the hull 10 is disposed above the flap type means 22R on the rear side. In addition, it is preferable to arrange | position the arrangement position of an up-down direction by the same view as the fin type | mold means 21. FIG.

The flap type means 22 reduces the increase in resistance of the hull 10 in the wave wind by causing the wind flowing around the hull 10 to act on the water level raising portion 4 during navigation in the vicinity of the bow Fp of the hull 10. The wind that flows around the hull 10 includes natural wind in addition to the wind that accompanies the navigation of the ship.
The flap type means 22 includes a flat flap 22a and a hinge portion 22b for attaching the flap 22a to the hull 10.

As shown in FIG. 3, the flap type means 22 can be stored in the hull 10.
Although not shown, it is preferable that the flap type means 22 changes the flap angle of the flap 22a.
Further, although the flap type means 22 are provided on the left and right sides of the hull 10, three or more flap type means 22 may be provided on each of the left and right sides, or only one flap type means 22 may be provided.

  The wave wind resistance increase / reduction device according to the second embodiment includes a wind measurement unit 30 that detects a wind state, and the flap angle of the flap 22a (open angle from the ship side) according to the measurement result of the wind state by the wind measurement unit 30. ) Is preferably controlled. That is, when the wind speed is low, the flap angle is increased to be horizontal, and when the wind speed is high, the flap 22a is tilted so that the front end of the flap 22a is downward. Further, the flap angle is changed so that the wind flows through the water level raising unit 4 according to the magnitude of the wind speed. The wind measuring means 30 may measure the wind direction in addition to the wind speed. When the wind direction is measured by the wind measuring means 30 and the wind direction and the direction of the bow Fp do not coincide with each other, the flap angles of the flaps 22a provided on the left and right sides of the hull 10 may be controlled separately according to the wind speed.

  According to the wave wind resistance increase / reduction device according to the second embodiment, the flap type means 22 can forcibly change the wind direction to suppress the rise of the water level, and particularly to the deck that increases when the wave is rough at the bow portion 11. The seawater driving can be reduced by the flap type means 22.

  Further, according to the wave wind resistance increase / reduction device according to the second embodiment, the flap type means 22 can change the flap angle and change the flap angle according to the strength of the wind, thereby increasing the water level according to the situation. Can be suppressed.

  Further, according to the wave wind resistance increase / reduction device according to the second embodiment, the wind measurement unit 30 that detects the wind state is provided, and the flap angle is controlled according to the measurement result of the wind state by the wind measurement unit 30; By changing the flap angle according to the measured wind condition, the rise in the water level can be suppressed following the situation change. If the wave is so large that it destroys the flap-type means 22, storing the flap-type means 22 can prevent the flap-type means 22 from being damaged.

FIG. 4 is a schematic configuration diagram showing a main part of a wave wind resistance increase / reduction apparatus according to Embodiment 3 of the present invention.
4A is a side view of the main part showing the duct type means, FIG. 4B is a top view of the main part, and FIG. 4C is a front view of the main part.
In the wave wind resistance increase / reduction apparatus according to the third embodiment, the water level rise suppression means 20 that takes in wind and blows it out to the water level riser 4 to act is the duct type means 23.

  The duct type means 23 includes an intake port 23a disposed at the front portion of the bolster 12 provided in the hull 10, an air outlet 23b in which at least one of the wind direction and the wind speed is variable, and an intake port 23a and an air outlet 23b. It is comprised with the duct 23c connected. The air flowing in from the intake port 23a is blown out from the outlet 23b through the duct 23c.

The intake port 23 a may be configured integrally with the bolster 12 in addition to being arranged at the front portion of the bolster 12. As described above, the intake port 23a is arranged at the front portion of the bolster 12 or is configured integrally with the bolster 12, thereby reducing resistance by reducing the wind flowing into the bolster 12.
Note that the intake port 23a may have a configuration in which a hole is formed in the outer plate of the hull 10.
Moreover, the intake port 23a can ensure the blowing wind speed from the blower outlet 23b by making opening cross-sectional area larger than the blower outlet 23b.
The duct 23 c is disposed in the hull 10.

The duct type means 23 is provided with an outlet 23 b in the bow portion 11 of the hull 10. The blower outlet 23b is arrange | positioned in the range H from the bow Fp (forehead draining part). The range H is within 5% of the captain Lpp for a normal ship, and within 10% of the captain Lpp even if a specially shaped ship is included.
The blower outlet 23b is attached above the water surface where the water level rises and above the water level raising part 4 predicted during navigation. In addition, it is preferable to arrange | position the arrangement | positioning position of the up-down direction of the blower outlet 23b by the same view as the fin type | mold means 21. FIG.

  The duct type means 23 causes the wind flowing around the hull 10 to act on the water level raising portion 4 at the time of navigation in the vicinity of the bow Fp of the hull 10, thereby reducing an increase in resistance of the hull 10 in the wave wind. The wind that flows around the hull 10 includes natural wind in addition to the wind that accompanies the navigation of the ship.

Although not illustrated, the intake port 23a and the air outlet 23b are preferably configured to be stored in the hull 10, but may be configured to be stored only in the air outlet 23b. If the wave is so large that it destroys the duct type means 23, in the case of a retractable configuration, the duct type means 23 can be stored in the hull 10 to avoid damage.
The duct type means 23 are provided on the left and right sides of the hull 10, but a plurality of duct type means 23 may be provided on each of the left and right sides.

The wave wind resistance increase / reduction device according to Embodiment 3 includes a wind measuring unit 30 that detects a wind state, and at least one of the wind direction and the wind speed from the air outlet 23b according to the measurement result of the wind state by the wind measuring unit 30. To control. That is, the wind direction is tilted forward when the measured wind speed is low, and the wind direction is tilted backward when the measured wind speed is high. Further, when the measured wind speed is low, the blowout wind speed is reduced, and when the measured wind speed is high, the blowout outlet 23b is throttled so that the blowout wind speed is increased.
Further, the wind direction is changed so that the wind flows through the water level raising unit 4 according to the magnitude of the wind speed. The wind measuring means 30 may measure the wind direction in addition to the wind speed. When the wind direction is measured by the wind measuring means 30, and the wind direction and the direction of the bow Fp do not coincide with each other, the wind direction and the blown wind speed of the outlet 23b provided on the left and right sides of the hull 10 are controlled separately according to the wind speed. Also good.

According to the wave wind resistance increase / reduction apparatus according to the third embodiment, it is possible to suppress the rise in the water level by taking in the wind by the duct type means 23 and blowing the wind out to the water level raising unit 4.
In addition, it is possible to reduce the seawater plunging into the deck, particularly when the waves at the bow 11 are rough, by the duct type means 23.

  Further, according to the wave wind resistance increase / reduction device according to the third embodiment, the duct-type means 23 includes the air outlet 23b in which at least one of the wind direction and the wind speed is variable, so that the water level that varies according to the strength of the wind is obtained. Since wind can be blown out to the ascending portion 4, an increase in the water level can be suppressed depending on the situation.

  Moreover, according to the wave wind resistance increasing / reducing device according to the third embodiment, the wind measuring unit 30 that detects the wind state is provided, and the wind direction from the outlet 23b and the wind direction are measured according to the measurement result of the wind state by the wind measuring unit 30. By controlling at least one of the wind speeds and changing the wind direction and the wind speed according to the measured wind state, it is possible to follow the change in the situation and suppress an increase in the water level.

  Further, according to the wave wind resistance increasing / reducing device according to the third embodiment, the duct-type means 23 has the intake port 23a arranged in the front portion of the bolster 12 provided in the hull 10 so that the wind flowing into the bolster 12 can be obtained. The resistance can be reduced by reducing.

  ADVANTAGE OF THE INVENTION According to this invention, the resistance which increases when the water level raising part of a ship's wave extends back | swing with a wind can be reduced.

4 Water level rising part 10 Hull 11 Bow part 12 Bolster 20 Water level rising suppression means 21 Fin type means 22 Flap type means 23 Duct type means 30 Wind measuring means

Claims (15)

  Reduced increase in resistance in wave wind, characterized by comprising a water level rise suppression means for causing wind flowing around the hull to act on a water level rise portion during navigation in the vicinity of the bow of the hull, and reducing increase in resistance of the hull in wave wind apparatus.   2. The resistance in wave wind according to claim 1, wherein the water level rise suppression means is a fin type means that changes the wind direction to act on the water level rise part, and the fin type means is provided at a bow portion of the hull. Increase mitigation device.   The wave wind resistance increase / reduction device according to claim 2, wherein the fin type means has a variable angle of attack with respect to a wind flow.   The apparatus according to claim 3, further comprising a wind measuring unit that detects a wind state, and controlling the angle of attack according to a measurement result of the wind state by the wind measuring unit.   2. The wind resistance according to claim 1, wherein the water level rise suppression means is a flap type means that changes the wind direction and acts on the water level rise portion, and the flap type means is provided at a bow portion of the hull. Increase mitigation device.   The wave wind resistance increase reduction device according to claim 5, wherein the flap type means has a variable flap angle.   The apparatus according to claim 6, further comprising a wind measuring unit that detects a wind state, and controlling the flap angle according to a measurement result of the wind state by the wind measuring unit.   2. The wave wind according to claim 1, wherein the water level rise suppression means is a duct type means that takes in wind and blows out and acts on the water level rise portion, and the duct type means is provided at a bow portion of the hull. Resistance increase / reduction device.   9. The wave wind resistance increase / reduction device according to claim 8, wherein the duct type means has a blowout port in which at least one of a wind direction and a wind speed is variable.   The wind measuring means for detecting the wind state is provided, and at least one of the wind direction and the wind speed from the outlet is controlled according to the measurement result of the wind state by the wind measuring means. Wave wind resistance increase reduction device.   11. The wave wind resistance increase / reduction device according to claim 8, wherein the duct type means has an intake port disposed at a front portion of a bolster provided in the hull.   The wave wind resistance increase / reduction device according to any one of claims 1 to 11, wherein a plurality of the water level rise suppression means are provided on each of the left and right sides of the hull.   A plurality of the water level rise suppression means are provided on each of the left and right sides of the hull, and as the water level rise suppression means, fin type means for changing the wind direction and acting on the water level rise part, and changing the wind direction and acting on the water level rise part 2. The resistance increase reducing device in wave wind according to claim 1, wherein at least two different means are used among a flap type means and a duct type means that takes in wind and blows it to the water level raising portion.   14. The wave wind resistance increase reducing device according to claim 1, wherein the water level rise suppressing means can be stored in the hull.   A ship equipped with the resistance increase / reduction device in wave wind according to any one of claims 1 to 14.