A method and device for measuring the sideslip angle of a wind tunnel test model

Abstract

The present invention belongs to the technical field of wind tunnel testing, and discloses a method and device for measuring the sideslip angle of a wind tunnel test model. The device includes a sideslip measurement tooling, a reference plate, and a measurement platform; the reference plate is a long strip-shaped flat plate fixed at the outlet of the nozzle; the measurement platform is a hexahedron with a reference plane, which is sleeved and fixed on the wind tunnel model; the sideslip measurement tooling is fixed on the side of the measurement platform, and a laser rangefinder is fixed on the sideslip measurement tooling, and the laser emission direction is towards the reference plate. The method includes installing the wind tunnel model and adjusting the angle of attack and roll angle of the wind tunnel model; installing the measurement platform; installing the sideslip measurement tooling; installing the laser rangefinder; emitting horizontal light rays; emitting oblique light rays; calculating the sideslip angle of the wind tunnel model; calculating the seven-time average sideslip angle of the wind tunnel model. The device and method realize the measurement of the sideslip angle of the model in the preparation stage of the wind tunnel test model, improve the accuracy of the test results, and provide data support for the development of aircraft.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind tunnel tests, and particularly relates to a method and device for measuring the sideslip angle of a wind tunnel test model. Background Art

[0002] Wind tunnel tests are one of the important means to obtain the aerodynamic characteristics of aircraft, supporting the development of the aerospace field. When conducting wind tunnel tests, the measurement of the model angle is extremely important and determines the quality of the test results. The sideslip angle is a key parameter describing the lateral offset angle of the model relative to the oncoming flow direction, and its accurate measurement is of great significance for studying the lateral aerodynamic characteristics, flight stability, and control of aircraft. However, during the model preparation stage before wind tunnel tests, unlike the angle of attack and roll angle that can be directly measured using an angle gauge, there is a problem that the sideslip angle cannot be effectively measured. The accuracy of the sideslip angle depends on the accuracy of model processing, installation, and the angle of attack mechanism itself. During this process, the test model installers cannot confirm the sideslip angle to ensure the installation accuracy. In particular, in multi-body separation tests, multiple separated bodies are respectively installed on different mechanisms or devices, and some devices are even added temporarily and do not have the ability to change the sideslip angle. How to confirm whether the sideslip angles between multiple mechanisms or devices match poses a practical requirement for the sideslip measurement method and device.

[0003] Currently, there is an urgent need to develop a method and device for measuring the sideslip angle of a wind tunnel test model. Summary of the Invention

[0004] One technical problem to be solved by the present invention is to provide a device for measuring the sideslip angle of a wind tunnel test model, and another technical problem to be solved is to provide a method for measuring the sideslip angle of a wind tunnel test model.

[0005] The device for measuring the sideslip angle of a wind tunnel test model of the present invention includes a sideslip measurement tooling, a reference plate, and a measurement platform;

[0006] The reference plate is a long rectangular flat plate fixed at the outlet of the nozzle; the measurement platform is a hexahedron with a reference plane, sleeved and fixed on the wind tunnel model; the sideslip measurement tooling is fixed on the side of the measurement platform, and a laser rangefinder is fixed on the sideslip measurement tooling, and the laser emission direction of the laser rangefinder faces the reference plate.

[0007] Further, the sideslip measurement tooling is a Π-shaped frame; the horizontal plate of the Π-shaped frame is the tooling base, the tooling base is fixed on the side of the measurement platform, and the central axis of the tooling base is parallel to the central axis of the wind tunnel model; the two vertical plates of the Π-shaped frame include a long vertical plate and a short vertical plate; the long vertical plate is a shielding end plate, the shielding end plate is close to the reference plate, and a horizontal hole is arranged along the length direction on the shielding end plate F 1and oblique holes F 2 ; The short vertical plate is the emission end plate, the emission end plate is far from the reference plate, and laser emission holes are arranged on the emission end plate O ;

[0008] The laser rangefinder is fixed on the outer side of the emission end plate, and the horizontal light emitted by the laser rangefinder sequentially passes through the laser emission holes O and horizontal holes F 1 and is incident on the horizontal point on the reference plate. The oblique light emitted by the laser rangefinder sequentially passes through the laser emission holes O and oblique holes F 2 and is incident on the oblique point on the reference plate.

[0009] The method for measuring the sideslip angle of a wind tunnel test model according to the present invention includes the following steps:

[0010] S10. Install the wind tunnel model and adjust the angle of attack and roll angle of the wind tunnel model;

[0011] Install the wind tunnel model on the support device of the wind tunnel, and then level the wind tunnel model through an angle measuring instrument to ensure that the angle of attack and roll angle of the wind tunnel model are the theoretical zero degrees;

[0012] S20. Install the measurement platform;

[0013] Set and fix the measurement platform on the wind tunnel model to ensure that each measurement reference surface of the measurement platform coincides with the model coordinate system;

[0014] S30. Install the sideslip measurement tooling;

[0015] Fix the tooling base of the sideslip measurement tooling on the side of the measurement platform, and the central axis of the tooling base is parallel to the central axis of the wind tunnel model;

[0016] S40. Install the laser rangefinder;

[0017] Fix the laser rangefinder on the outer side of the emission end plate by means of holding it by hand, etc., and the laser head of the laser rangefinder is aligned with the laser emission hole on the sideslip measurement tooling O ;

[0018] S50. Emit horizontal light;

[0019] The laser rangefinder emits horizontal light, and the horizontal light sequentially passes through the laser emission holes O and horizontal holes F 1 and is incident on the horizontal point on the reference plate. The distance between the laser emission hole O and the horizontal point is ; The laser emission hole OThe vertical distance from the reference plate is D ;

[0020] S60. Emit an oblique ray;

[0021] The laser rangefinder emits an oblique ray, and the oblique ray passes through the laser emission hole O , the oblique hole F 2 and is incident on the oblique incidence point on the reference plate. The distance between the laser emission hole O and the oblique incidence point is ;

[0022] S70. Calculate the sideslip angle of the wind tunnel model β ;

[0023] The angle between the horizontal ray and the oblique ray is A , and the sideslip angle β The calculation formula is as follows:

[0024] ;

[0025] S80. Calculate the seven - time average sideslip angle of the wind tunnel model;

[0026] Continuously adjust the position of the wind tunnel model in the wind tunnel and conduct seven measurements, and then calculate the seven - time average sideslip angle of the wind tunnel model by the method of taking the average value. The seven - time average sideslip angle is used as the sideslip angle of the wind tunnel model.

[0027] Further, the angle A between the horizontal ray and the oblique ray is 45°.

[0028] The method and device for measuring the sideslip angle of a wind tunnel test model of the present invention use the spatial geometric transformation relationship to convert the measurement of the sideslip angle of the test model into distance measurement. First, the lengths of the horizontal ray and the oblique ray are measured by a laser rangefinder, and then the sideslip angle is obtained through the spatial geometric transformation relationship between the lengths of the horizontal ray and the oblique ray and the sideslip angle.

[0029] The method and device for measuring the sideslip angle of a wind tunnel test model of the present invention realize the measurement of the sideslip angle of the model in the preparation stage of the wind tunnel test, improve the accuracy of the test results, and provide good data support for the lateral aerodynamic characteristics, flight stability and control of the aircraft. Brief Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the device for measuring the sideslip angle of a wind tunnel test model of the present invention;

[0031] Figure 2 is a schematic structural diagram of the sideslip angle measurement tooling in the device for measuring the sideslip angle of a wind tunnel test model of the present invention;

[0032] Figure 3 This is the schematic diagram of the method for measuring the sideslip angle of the wind tunnel test model of the present invention.

[0033] In the figure, 1. Sideslip measurement tooling; 2. Laser rangefinder; 3. Reference plate; 4. Nozzle; 5. Measurement platform; 6. Wind tunnel model;

[0034] 101. Tooling base; 102. Emission end plate; 103. Shielding end plate; 104. Laser emission hole O ; 105. Horizontal hole F 1 ; 106. Oblique shooting hole F 2 ; 107. Horizontal light ray; 108. Oblique shooting light ray;

[0035] Figure 3 in O denotes the laser emission hole O . Specific implementation mode

[0036] The following uses specific specific examples to illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0037] Example: As Figure 1 shown, the device for measuring the sideslip angle of the wind tunnel test model in this embodiment includes a sideslip measurement tooling 1, a reference plate 3, and a measurement platform 5;

[0038] The reference plate 3 is a long strip flat plate and is fixed at the outlet of the nozzle 4; the measurement platform 5 is a hexahedron with a reference plane, is sleeved and fixed on the wind tunnel model 6; the sideslip measurement tooling 1 is fixed on the side of the measurement platform 5, and the laser rangefinder 2 is fixed on the sideslip measurement tooling 1, and the laser emission direction of the laser rangefinder 2 faces the reference plate 3.

[0039] Furthermore, as Figure 2 shown, the sideslip measurement tooling 1 is a Π-shaped frame; the horizontal plate of the Π-shaped frame is the tooling base 101, the tooling base 101 is fixed on the side of the measurement platform 5, and the central axis of the tooling base 101 is parallel to the central axis of the wind tunnel model 6; the two vertical plates of the Π-shaped frame include a long vertical plate and a short vertical plate; the long vertical plate is the shielding end plate 103, the shielding end plate 103 is close to the reference plate 3, and a horizontal hole is arranged along the length direction on the shielding end plate 103 F 1105 and the oblique holes F 2 106; the short vertical plate is the emission end plate 102, the emission end plate 102 is away from the reference plate 3, and laser emission holes are arranged on the emission end plate 102 O 104;

[0040] The laser rangefinder 2 is fixed on the outside of the emission end plate 102, and the horizontal light ray 107 emitted by the laser rangefinder 2 sequentially passes through the laser emission holes O 104, the horizontal hole F 1 105 and is incident on the horizontal point on the reference plate 3. The oblique light ray 108 emitted by the laser rangefinder 2 sequentially passes through the laser emission holes O 104, the oblique hole F 2 106 and is incident on the oblique point on the reference plate 3.

[0041] The method for measuring the sideslip angle of the wind tunnel test model in this embodiment includes the following steps:

[0042] S10. Install the wind tunnel model 6 and adjust the angle of attack and roll angle of the wind tunnel model 6;

[0043] Install the wind tunnel model 6 on the support device of the wind tunnel, and then level the wind tunnel model 6 through the angle measuring instrument to ensure that the angle of attack and roll angle of the wind tunnel model 6 are the theoretical zero degrees;

[0044] S20. Install the measurement platform 5;

[0045] Set and fix the measurement platform 5 on the wind tunnel model 6 to ensure that each measurement reference plane of the measurement platform 5 coincides with the model coordinate system;

[0046] S30. Install the sideslip measurement tooling 1;

[0047] Fix the tooling base 101 of the sideslip measurement tooling 1 on the side of the measurement platform 5, and the central axis of the tooling base 101 is parallel to the central axis of the wind tunnel model 6;

[0048] S40. Install the laser rangefinder 2;

[0049] Fix the laser rangefinder 2 on the outside of the emission end plate 102 by means of holding it by hand, etc., and the laser head of the laser rangefinder 2 is aligned with the laser emission hole O 104;

[0050] S50. Emit the horizontal light ray 107;

[0051] As Figure 3 shown, the laser rangefinder 2 emits the horizontal light ray 107, and the horizontal light ray 107 sequentially passes through the laser emission holes O104. Horizontal hole F 1 105. Horizontal point incident on the reference plate 3, laser emission hole O The distance between 104 and the horizontal point is ; Laser emission hole O The vertical distance between 104 and the reference plate 3 is D ;

[0052] S60. Emit the oblique ray 108;

[0053] The laser rangefinder 2 emits the oblique ray 108, and the oblique ray 108 sequentially passes through the laser emission hole O 104, oblique hole F 2 106. Oblique point incident on the reference plate 3, laser emission hole O The distance between 104 and the oblique point is ;

[0054] S70. Calculate the sideslip angle of the wind tunnel model 6 β ;

[0055] The included angle between the horizontal ray 107 and the oblique ray 108 is A , sideslip angle β The calculation formula is as follows:

[0056] ;

[0057] S80. Calculate the seven - time average sideslip angle of the wind tunnel model 6;

[0058] Continuously adjust the position of the wind tunnel model 6 in the wind tunnel and conduct seven measurements, and then calculate the seven - time average sideslip angle of the wind tunnel model 6 by the method of taking the average value, and take the seven - time average sideslip angle as the sideslip angle of the wind tunnel model 6.

[0059] Furthermore, the included angle A between the horizontal ray 107 and the oblique ray 108 is 45°.

[0060] The above - mentioned embodiments merely illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above - mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An apparatus for measuring the sideslip angle of a wind tunnel test model, characterized in that The described device includes a sideslip measurement tooling (1), a reference plate (3), and a measurement platform (5); The reference plate (3) is a long strip-shaped flat plate fixed at the outlet of the nozzle (4); the measurement platform (5) is a hexahedron with a reference plane, sleeved and fixed on the wind tunnel model (6); the sideslip measurement tooling (1) is fixed on the side of the measurement platform (5), and the laser rangefinder (2) is fixed on the sideslip measurement tooling (1), and the laser emission direction of the laser rangefinder (2) faces the reference plate (3); The described side-slip measurement tooling (1) is a Π-shaped frame; the horizontal plate of the Π-shaped frame is the tooling base (101), and the tooling base (101) is fixed to the side of the measurement platform (5). The central axis of the tooling base (101) is parallel to the central axis of the wind tunnel model (6); the two vertical plates of the Π-shaped frame include one long vertical plate and one short vertical plate; the long vertical plate is the shielding end plate (103), the shielding end plate (103) is close to the reference plate (3), and horizontal holes F 1 (105) and oblique injection holes F 2 (106) are arranged along the length direction on the shielding end plate (103); the short vertical plate is the emission end plate (102), the emission end plate (102) is far from the reference plate (3), and a laser emission hole O (104) is arranged on the emission end plate (102); The laser rangefinder (2) is fixed on the outer side of the transmitting end plate (102), and the horizontal light beam (107) emitted by the laser rangefinder (2) passes through the laser emission hole O (104) and the horizontal hole F 1 and is incident on the horizontal point on the reference plate (3). The oblique light beam (108) emitted by the laser rangefinder (2) passes through the laser emission hole O (104) and the oblique hole F 2 and is incident on the oblique point on the reference plate (3).

2. A method for measuring the sideslip angle of a wind tunnel test model, which is used for the device for measuring the sideslip angle of a wind tunnel test model described in claim 1, characterized in that, The described method includes the following steps: S10. Install the wind tunnel model (6) and adjust the angle of attack and roll angle of the wind tunnel model (6); Install the wind tunnel model (6) on the support device of the wind tunnel, and then level the wind tunnel model (6) through an angle measuring instrument to ensure that the angle of attack and roll angle of the wind tunnel model (6) are the theoretical zero degrees; S20. Install the measurement platform (5); Sleeve and fix the measurement platform (5) on the wind tunnel model (6) to ensure that each measurement reference plane of the measurement platform (5) coincides with the model coordinate system; S30. Install the sideslip measurement tooling (1); Fix the tooling base (101) of the sideslip measurement tooling (1) on the side of the measurement platform (5), and the central axis of the tooling base (101) is parallel to the central axis of the wind tunnel model (6); S40. Install the laser rangefinder (2); Fix the laser rangefinder (2) on the outside of the transmitting end plate (102) by hand or other means, and align the laser head of the laser rangefinder (2) with the laser emission hole O (104) on the side-slip measurement tooling (1); S50. Emit a horizontal light ray (107); The laser rangefinder (2) emits a horizontal light ray (107), and the horizontal light ray (107) passes through the laser emission hole O (104) and the horizontal hole F 1 and is incident on the horizontal point on the reference plate (3). The distance between the laser emission hole O (104) and the horizontal point is ; The vertical distance between the laser emission hole O (104) and the reference plate (3) is D ; S60. Emit an oblique light ray (108); The laser rangefinder (2) emits an oblique light beam (108), and the oblique light beam (108) passes through the laser emission hole O (104) and the oblique hole F 2 (106) and enters the oblique incidence point on the reference plate (3). The distance between the laser emission hole O (104) and the oblique incidence point is ; S70. Calculate the sideslip angle of the wind tunnel model (6) β ; The included angle between the horizontal light ray (107) and the obliquely incident light ray (108) is A , the sideslip angle β The calculation formula is as follows: ； S80. Calculate the seven-time average sideslip angle of the wind tunnel model (6); Continuously adjust the position of the wind tunnel model (6) in the wind tunnel and conduct seven measurements, and then calculate the seven-time average sideslip angle of the wind tunnel model (6) by the method of taking the average, and take the seven-time average sideslip angle as the sideslip angle of the wind tunnel model (6).

3. The method for measuring the sideslip angle of a wind tunnel test model according to claim 2, characterized in that, The included angle between the horizontal light ray (107) and the obliquely incident light ray (108) A is 45°.

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