JPH078744U - Wind tunnel test equipment - Google Patents

Abstract

(57) [Summary] [Purpose] While measuring the wind speed distribution, the strength of the air volume by each blower can be adjusted to reproduce the boundary layer in a short time and without much effort.
The space for installing obstacles is unnecessary and the size of the experimental equipment is prevented from increasing. [Structure] A plurality of blowers 2 are arranged in parallel in the vertical direction and / or the left-right direction at one end of a wind tunnel experimental apparatus 1, and the blown amount of each blower 2 is independently controllable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wind tunnel experimental device used for experimenting with wind velocity distribution, and in particular, it controls wind velocity distribution such as boundary layer in a wind tunnel by generating different winds using multiple blowers. It relates to a wind tunnel experimental device.

[0002]

[Prior art]

 Conventionally, a wind tunnel test device has been used to test wind velocity distribution and the like. The wind tunnel experimental device is provided with one blower on one end side of the device, drives this blower to create a desired wind speed, and blows this into the wind tunnel.

By the way, in the conventional wind tunnel test device, in order to adjust the velocity gradient of the boundary layer or the like in the wind tunnel, a large number of obstacles such as blocks according to the wind velocity distribution are caused as factors affecting the wind velocity distribution. The block is manufactured, and many obstacles such as blocks are arranged in the wind tunnel, and the wind speed is supplied from the one blower.

Then, while measuring the wind velocity distribution, the arrangement of obstacles such as blocks is adjusted, and this work is repeated until the target wind velocity distribution is reached.

[0005]

[Problems to be solved by the device]

 However, since there are many obstacles such as blocks placed in the wind tunnel to adjust the velocity gradient, it takes a lot of time and labor to adjust them, and the experiment time becomes long and the experimental efficiency decreases. Was invited.

Further, in the case of automatically arranging an obstacle such as a block in order to adjust the speed gradient, there is a drawback that the structure becomes complicated and expensive, and automation is difficult from the viewpoint of cost.

Furthermore, a space for arranging many obstacles such as blocks is required in the wind tunnel, and the wind tunnel experimental device has a drawback that the space for arranging the obstacles becomes long and the device becomes large. It was

The present invention has been made in view of the above problems and was devised to solve the problems. The purpose of the present invention is to measure the wind speed distribution and determine the strength of the air volume of each blower. Can be adjusted to adjust the wind velocity distribution such as the boundary layer in a short time and without much labor, and the space for installing obstacles can be eliminated to increase the size of the experimental device. It is to provide a wind tunnel test device that can prevent it.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a plurality of air blowers arranged in parallel in the vertical direction and / or the horizontal direction at one end of the wind tunnel experimental device, and the air flow rate of each air blower can be independently controlled. It is composed of

[0010]

[Action]

 The present invention having the above-mentioned structure operates as follows. That is, a plurality of blowers are arranged in parallel in the vertical direction and / or the horizontal direction at one end of the wind tunnel experimental device, and the blower volume of each blower is independently controllable, thereby controlling each blower. By doing so, it is possible to adjust the amount of air blown by each blower and supplied into the wind tunnel, which allows the wind velocity distribution of the boundary layer to be reproduced arbitrarily.

[0011]

【Example】

 Hereinafter, the present invention will be described more specifically on the basis of the embodiments shown in the drawings. Here, FIG. 1 is a side sectional view of the wind tunnel experimental apparatus, and FIG. 2 is a vertical sectional view of an end portion of the wind tunnel experimental apparatus.

In the figure, a wind tunnel test device 1 is a device for realizing an arbitrary wind velocity distribution, and the wind tunnel test device 1 is horizontally installed horizontally and is an elongated rectangular type whose width is narrower than its height. It consists of a cylinder.

At one end of the wind tunnel test device 1, a plurality of blowers 2 are provided in parallel in the vertical direction, respectively. Each blower 2 is provided with a fan 2b inside a circular cylindrical body 2a, and a mechanism is provided for sucking and blowing outside air by rotating the fan 2b.

A drive motor 2c for rotating and driving each fan 2b is attached to each blower 2. Each drive motor 2c can be independently controlled, and its rotation speed is controlled by, for example, inverter control. Each drive motor 2c of each blower 2 is controlled by the computer 3, for example.

On the end portion side of the wind tunnel test apparatus 1 where the blower 2 is provided, the deformable cylinders 4 each having one end connected to the circular cylinder 2a of each blower 2 are provided in parallel vertically. The deforming cylinder 4 is provided to smoothly guide the air supplied from each of the circular blowers 2 into the rectangular contracting flow dividing cylinder 5.

For this reason, the cross-sectional shape of the deformable cylinder 4 is formed in a circular shape at one end side connected to the circular cylinder body 2a, and at the other end side connected to the contracted flow dividing cylinder body 5 is square. . The cross-sectional shape of the deformable cylinder 4 is continuously deformed from a circular shape to a rectangular shape from one end side to the other end side.

The contracted-flow split cylinder 5 is an air blower 2 that is made to have different wind speeds according to the content of the experiment in each blower 2 while maintaining the respective wind speeds. This is a passage provided to smoothly guide and guide the observation cylinder 7.

The contracted flow dividing cylinder 5 is continuously contracted from the upstream side to the downstream side in the air flow direction, and the chambers are divided in the vertical direction, and each chamber is shut off. However, the air passing through each chamber does not mix with each other, and the wind speed is maintained.

A rectifying cylinder 6 is provided between the contracted-flow split cylindrical body 5 and the experimental observation cylindrical body 7. The flow regulating tubular body 6 is a chamber for making the wind velocity generated by each blower 2 uniform, and inside the flow regulating tubular body 6, for example, a rectifier 6a made of, for example, a honeycomb shape or a wire net is provided in the vertical direction. Has been. The rectifier 6a is also provided in the front-back direction.

In each blower 2, the wind speed is generated by the fan 2b, but since the fan 2b rotates, the generated wind speed has a spiral shape. Therefore, it is necessary to change this to a uniform wind speed. The rectifier 6a provided inside the body 6 changes the spiral wind speed to a uniform wind speed.

The experimental observation cylinder 7 is constructed by each blower 2, and the wind speed distribution is tested by using the strong and weak wind speeds that have passed through the deforming cylinder 4, the contracting flow dividing cylinder 5 and the flow regulating cylinder 6. In the observation room, an observation window (not shown) is formed on the side wall of the room to allow observation from the outside. The downstream end of the experimental observation cylinder 7 is a discharge port.

Next, the operation based on the configuration of the above embodiment will be described below. When an experiment of the wind speed distribution is performed using this wind tunnel experiment device 1, the drive motors 2c of the blowers 2 are respectively started to drive and rotate the fans 2b of the blowers 2. By the rotation of the fan 2b of each blower 2, air is forced into the wind tunnel experimental device 1 from the outside.

The wind speed is changed by changing the rotation speed of the fan 2b of each blower 2 and changing the amount of air sucked and sent by the fan 2b according to the content of the experiment. The rotation speed of the fan 2b of each blower 2 is controlled by the computer 3, for example, by inverter control.

The compressed air that is forcibly sucked and sent by the fan 2b of each blower 2 enters into each deforming cylinder 4 from the circular cylinder 2a of each blower 2. The air that has entered each deforming cylinder 4 flows in the cylinder that is continuously deformed from a circular shape to a rectangular shape, and enters the contracting flow dividing cylindrical body 5 that has a rectangular cross section. The air that has entered each of the contracted-flow divided tubular bodies 5 flows toward the downstream side without being mixed with each other, and flows into the rectifying tubular body 6 from the end thereof.

The air flowing into the rectifying cylinder 6 is sucked and blown by the fans 2b of the blowers 2. Due to the rotation of the fans 2b, the wind speed of the air generally rotates in a spiral shape. Since it is advancing while it is progressing, it is necessary to convert this into a uniform flow that does not rotate spirally, and the rectifier 6a of the rectifying cylinder 6 converts it into a uniform flow wind velocity.

The wind speed rectified by the rectifying cylinder 6 flows into the experimental observation cylindrical body 7, where an experiment of the wind speed distribution is conducted. The wind velocity flowing into the experimental observation cylinder 7 is changed in advance by the fan 2 b of each blower 2, and the wind velocity inside the experimental observation cylinder 7 is maintained in a state where the strength of the wind speed is maintained. Since the wind velocity distribution structure changes, various wind velocity distributions can be created in the experimental observation cylinder 7, and various experiments can be performed. In the case of the smoke visualization experiment, the air discharged from the flow straightening cylinder 6 is partially colored so that the state of the wind speed distribution can be seen.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the case where a plurality of blowers are arranged in the vertical direction has been described, but they may be arranged in the horizontal direction, and may be arranged in both the vertical and horizontal directions.

[0028]

EFFECTS OF THE INVENTION As is clear from the above description, according to the wind tunnel test device of the present invention, a plurality of blowers are arranged side by side in the vertical direction and / or the horizontal direction at one end of the wind tunnel test device. By controlling the blower volume of each blower independently, by controlling each blower, the blower volume produced by each blower and supplied to the wind tunnel can be adjusted. The wind velocity distribution can be reproduced arbitrarily.

As described above, by adjusting the air flow rate of each blower while measuring the wind speed distribution, it is possible to adjust the wind speed distribution in a short time and without a great deal of labor. Moreover, it is possible to prevent the experimental apparatus from becoming large-sized by eliminating the need for a space for installing an obstacle such as a block.

In addition, it is possible to adjust the thickness of the boundary layer, which cannot be achieved by using a conventional obstacle such as a block. Furthermore, by connecting it to a computer, the wind speed distribution can be easily specified and adjusted, which has extremely practical and beneficial effects.

[Brief description of drawings]

FIG. 1 is a side sectional view of a wind tunnel test device showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of an end portion of a wind tunnel test device showing an embodiment of the present invention.

[Explanation of reference symbols] 1 wind tunnel experimental device 2 blower 2a circular cylinder 2b fan 2c drive motor 3 computer 4 deforming cylinder 5 contracting flow dividing cylinder 6 rectifying cylinder 6a rectifier 7 experimental observing cylinder

Claims (1)

[Scope of utility model registration request] 1. A vertical direction or /
And a plurality of blowers arranged side by side in the left-right direction, and the blow rate of each blower can be independently controlled.