TWI633292B - Wind tunnel installation - Google Patents

Abstract

The present application proposes a wind tunnel device having a pair of flow generators, a first passage, a second passage, a first constricted section, and a test assembly. The first channel and the second channel are respectively connected to two sides of the convection generator. The first constricted section has a wide end and a narrow end, and the wide end of the first constricted end is connected to the first passage. One end of the test assembly is connected to the narrow end of the first constricted section, and the other end is connected to the second passage. The standard part and the at least one test piece are mounted on the test component for testing or correction. Therefore, the present invention has the advantage that the fluid flow rate is increased through the first constriction section, providing a wide range of test condition changes.

Description

Wind tunnel installation

This work is about a scientific instrument, especially about a hydrodynamic instrument.

A wind tunnel is a hydrodynamic, and in particular aerodynamic, experimental instrument that produces an artificial airflow to test the performance of a mold or sample under different airflows. Large wind tunnel installations can accommodate cars and even complete aircraft; small wind tunnel installations can be placed in the laboratory to measure small objects to be tested, for example to calibrate anemometers.

In the existing small wind tunnel device, since the power of the device is small and the energy supplied is limited, the maximum wind speed generated is limited. In other words, the existing small wind tunnel installations can provide a limited range of wind speeds, which in turn impose restrictions on the experiment.

On the other hand, the existing wind tunnel device is used for the calibration of the wind speed timer, and is measured by a standard anemometer and an anemometer to be measured simultaneously placed in the wind tunnel device. In other words, only one anemometer to be tested can be measured per measurement, which is very inefficient.

In view of this, it is an urgent problem to be solved in the industry to propose a better improvement solution.

The main purpose of this creation is to provide a wind tunnel device that provides large variations in test conditions for testing or correcting a standard component and at least one component to be tested.

In order to achieve the above object, the wind tunnel device proposed by the present invention has: a pair of flow generators; a first passage having one end connected to one side of the convection generator; and a second passage having one end connected to the convection generator The other side; a first constricted section having a wide end and a narrow end, the wide end of the first constricted section being coupled to the other end of the first passage relative to the convection generator; a test assembly having one end connected to the narrow end of the first constricted section and the other end connected to the other end of the second passage relative to the convection generator; the test assembly is provided with a plurality of mounting portions for The test component is of a straight cylindrical shape, and the test component has: a test section, which is a quadrangular cylinder; the mounting openings are formed on each side of the test section; And a mounting portion, which is an octagonal cylinder; the mounting openings are formed on each side of the mounting portion; and the test section is a quadrangular cylinder.

Therefore, the present invention has the advantage that the wind tunnel device increases the fluid flow rate through the first constriction section, providing a wide range of test condition changes.

10‧‧‧ convection generator

20‧‧‧First Passage

21‧‧‧ turning section

22‧‧‧ horizontal section

23‧‧‧Rotary section

24‧‧‧ turning guide

30‧‧‧second channel

40‧‧‧First contraction

41, 511B‧‧‧ wide mouth

42, 512B‧‧‧ narrow mouth

50‧‧‧Test components

500‧‧‧Installation

50A‧‧‧First Test Module

51A‧‧‧Front connection section

52A‧‧‧First test segment

53A‧‧‧After connecting section

54A‧‧‧Installation Department

50B‧‧‧Second test module

51B‧‧‧Second contraction

52B‧‧‧Second test segment

53B‧‧‧ wide mouth

A‧‧‧Standard parts

B‧‧‧Testpieces

FIG. 1 is a perspective view of the first test module assembled and assembled.

2 is a perspective view of the first test module of the present invention.

FIG. 3 is a schematic cross-sectional view showing the mounting portion of the first test module of the present invention.

FIG. 4 is a perspective view of the second test module assembled by the author.

FIG. 5 is a perspective view of the second test module of the present invention.

6 is a cross-sectional view of a test segment of the second test module of the present invention.

First, please refer to Figure 1 to Figure 3. The present invention proposes a wind tunnel device which can be equipped with a standard part A and at least one to-be-tested part B. The standard part A can be a corrected standard anemometer, and the to-be-tested part B is an anemometer which needs to be adjusted and corrected. The wind tunnel device has a pair of flow generators 10, a first passage 20, a second passage 30, a first contraction section 40, and a test assembly 50, and the convection generator 10, the first passage 20, the first contraction section 40, The test assembly 50 and the second passage 30 are cyclically connected in series with each other in order to allow the airflow to circulate in the wind tunnel device. The standard part A and the at least one test piece B are mounted on the test assembly 50.

Specifically, the first channel 20 is connected to one side of the convection generator 10, and the first contraction section 40 is successively connected to the other end of the first channel 20 with respect to the convection generator 10. The test component 50 is connected to the first A constricted section 40, while the second passage 30 is successively coupled to the test assembly 50, and the second passage 30 is coupled to the other side of the convection generator 10, thereby forming a recirculating flow passage.

In this embodiment, an open gap (not shown) is formed at the junction of the first channel 20 and the convection generator 10, whereby air can be supplied from the first channel 20 when the airflow circulates in the circulation flow path. A gap with the convection generator 10 flows into the circulation flow path to supplement the air in the circulation flow path.

In the present embodiment, the first passage 20 has a turning section 21, a horizontal section 22 and a turning section 23. The turning section 21 is connected to the upper side of the convection generator 10 and extends upward from the convection generator 10 to form a 90 degree turning angle, and then extends horizontally. The horizontal section 22 is successively connected to the turning section 21 and extends horizontally, and the turning section 23 is successively connected to the other end of the horizontal section 22 and forms a 180 degree turning angle. The bending points in the turning section 21 and the turning section 23 each have a plurality of turning guides 24 extending along the bending curve of the turning section 21 and the turning section 23.

The first constricted section 40 extends horizontally and has a wide end 41 and a narrow end 42. The width of the wide end 41 is greater than the width of the narrow end 42 and the cross section of the wide end 41 and the narrow end 42. Cross section The ratio of the product is about ten to one (such as 10.24:1). The wide end 41 of the first constricted section 40 is coupled to the other end of the first passage 20 relative to the convection generator 10, i.e., to the end of the swivel section 23 of the first passage 20.

The test assembly 50 also extends horizontally, and one end of the test assembly 50 is coupled to the narrow end 42 of the first converging section 40 and the other end is coupled to the second passage 30. In other words, one end of the second channel 30 is connected to the test component 50, the other end is connected to the convection generator 10, and the one end of the second channel 30 connected to the test component 50 is narrower, and the other end connected to the convection generator 10 is wider. . Therefore, the second passage 30 is gradually widened in the direction in which the airflow flows. The second passage 30 also extends horizontally.

Test assembly 50 has a test section that is a polygonal cylinder. The test section is formed with a plurality of mounting openings 500, and each of the mounting openings 500 is formed on each side of the polygonal cylinder. The number of at least one test piece B is plural. Therefore, in the embodiment, the standard component A is installed in one of the mounting ports 500, and the plurality of DUTs B are respectively mounted on the remaining mounting ports 500 to simultaneously test the plurality of devices B to be tested.

Please refer to FIG. 1 , FIG. 2 and FIG. 5 . The test assembly 50 can be straight or can be further contracted to form a second constricted section. In this embodiment, the test component 50 has a plurality of modular test modules to create various test environments and provide different wind speeds. For example, the test component 50 can have a first test module 50A and a second test module 50B, and at the same time, only one of the first test module 50A and the second test module 50B is installed in the wind tunnel device. .

Referring to FIG. 1 to FIG. 3 again, the first test module 50A has a straight cylindrical shape, and has a mounting portion 54A, a front connecting portion 51A, a first test segment 52A and a rear connecting segment 53A arranged in series. The widths of the front connecting section 51A, the first test section 52A, and the rear connecting section 53A are all equal. The mounting portion 54A is detachably coupled to the narrow end 42 of the first converging section 40, and the rear connecting section 53A is detachably coupled to the second passage 30.

The mounting opening 500 can be formed on the mounting portion 54A and on the first test segment 52A. Therefore, the standard component A and the at least one device B to be tested can be mounted on the mounting portion 54A and on the first test segment 52A. . Yu Shishi In the embodiment, the mounting portion 54A of the first test module 50A is an octagonal cylinder (as shown in FIG. 3), and each side surface thereof forms an installation opening 500, so that up to eight test pieces can be installed. B; The first test segment 52A is a quadrilateral cylinder and is formed with four mounting ports 500, so that it can hold up to four D-pieces B. During the test, the installation position is adjusted according to the size of the workpiece B to be tested. For example, when the standard member A is mounted on the mounting opening 500 of the mounting portion 54A, the device under test B is attached to the mounting opening 500 of the first test segment 52A. On the other hand, if the standard member A is mounted on the mounting opening 500 of the first test segment 52A, the device under test B is attached to the mounting opening 500 of the mounting portion 54A. In other words, the standard part A and the test piece B are not mounted at the same location.

Please refer to FIG. 4 to FIG. 6 next. The second test module 50B is further contracted to enable the wind tunnel device to provide a higher velocity airflow. Specifically, the second test module 50B has a second constricted section 51B, a second test section 52B and a wide section 53B which are arranged in series. The second constricted section 51B has a wide end 511B and a narrow end 512B, and the wide end 511B of the second constricted section 51B is connected to the narrow end 42 of the first constricted section 40, and the width of the second constricted section 51B The mouth end 511B is less than or equal to the narrow end 42 of the first constricted section 40.

The cross-sectional size of the second test segment 52B is equal to the narrow end 512B of the second constricted segment 51B and further reduced, and the ratio of the cross-sectional area of the second test segment 52B to the wide end 511B of the second constricted segment 51B may be less than one. Than two (eg 1:2.7...)

The wide mouth section 53B is located between the second test section 52B and the second passage 30. The second constricted section 51B is detachably coupled to the narrow end 42 of the first constricted section 40, and the wide section 53B is detachably coupled to the second passage 30. One end of the wide mouth section 53B connected to the second test section 52B is narrower, and the other end connected to the second channel 30 is wider. In other words, the narrow end 512B of the second constricted section 51B is indirectly connected to the second passage 30.

The standard member and the at least one device to be tested may be mounted on the second test segment 52B between the second constricted section 51B and the second passage 30. The second test segment 52B of the second test module 50B is a polygonal cylinder. And because the second test module 50B is further contracted, the cross section of the second test segment 52B is smaller, so the flow rate of the second test segment 52B can be greater than or equal to the flow rate of the first test segment.

Please refer to FIG. 1 and FIG. 5 next. When the calibration is performed, the standard component and the device to be tested are respectively installed on the mounting port 500 of the first test module 50A or the second test module 50B, and then the convection generator 10 is activated to enable the fluid to flow in the circulation flow channel. Different test environments can be created by controlling the output power of the convection generator 10 to provide different fluid flow rates. With the first constricted section 40, the fluid increases the flow rate as the cross-sectional area is reduced as it passes through the first constricted section 40. This creation thus provides a high-speed test environment.

In addition, if a higher fluid flow rate is required to create a more extreme test environment, the first test module 50A can be removed and replaced with a second test module 50B to pass through the second test module 50B. The constricted section 51B further narrows the cross-sectional area of the circulation flow path and increases the flow rate again.

In summary, the wind tunnel device of the present invention not only increases the fluid flow rate through the first constricted section 40, but also increases the fluid flow rate by replacing the first test module 50A with the second test module 50B, thereby providing a more High wind pressure and a wider range of test variations. In addition, the test component 50 has a plurality of mounting ports 500. Therefore, in addition to the installation of one standard component A, a plurality of components B to be tested can be installed, and at the same time, a plurality of components B to be tested are measured, thereby saving test time.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Although the present invention has been disclosed above in the preferred embodiment, it is not intended to limit the present invention, and is not in any technical field. A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. The technical essence of the present invention, any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the present technical solution.

Claims (1)

A wind tunnel device can be equipped with a standard component and at least one device to be tested, the wind tunnel device having: a pair of flow generators; a first passage having one end connected to one side of the convection generator; and a second passage One end is connected to the other side of the convection generator; a first constricted section has a wide end and a narrow end, and the wide end of the first constricted end is connected to the first passage relative to The other end of the convection generator; and a test assembly having one end connected to the narrow end of the first constricted section and the other end connected to the other end of the second passage relative to the convection generator; the test assembly a plurality of mounting openings are provided for mounting the standard component or the at least one device to be tested; the test component is in a straight shape, and the test component has: a test section, which is a quadrilateral cylinder; The mouth is formed on each side of the test section; and a mounting portion is an octagonal cylinder; the mounting openings are formed on each side of the mounting portion; and the test section is a quadrilateral cylinder.