High-speed wind tunnel lag of wash derivative test device
A high-speed wind tunnel and test device technology, applied in the field of wind tunnel testing, can solve problems such as insufficient high-speed wind tunnel measurement capabilities, and achieve the effects of small structure size, interference suppression, and good versatility
Active Publication Date: 2021-03-30
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology
[0005] The technical problem of the present invention is to overcome the deficiencies of the prior art, and provide a high-speed wind tunnel washing flow time difference test device, which can directly measure the wash flow time difference derivative generated by heave / translational acceleration, and realize pure rotation damping derivative and heave The separation of / translational damping derivative is suitable for the measurement of the time difference derivative of the wash flow in the high-speed wind tunnel with strict requirements on the structure size of the test model and supported by the tail support, which solves the problem of insufficient measurement capability of the high-speed wind tunnel
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[0033] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments disclosed in the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0034] Such as figure 1 , in this embodiment, the high-speed wind tunnel washing flow time difference derivative test device, including: aircraft model 1, dynamometer balance 2, motion reversing mechanism 3, strut 4, push rod 5 and hydraulic cylinder 6. Wherein, hydraulic cylinder 6 is installed in the inner chamber of one side of pole 4 fixed ends, and the other end of pole 4 is connected with motion reversing mechanism 3; The output end of hydraulic cylinder 6 and the input end of motion reversing mechanism 3 are pushed through The rod 5 is connected; one end of the force measuring balance 2 is connected with the output end of the motion reversing mechanism 3, and the other end is connected with the aircraft model 1.
[0035] In thi...
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The invention discloses a high-speed wind tunnel lag of wash derivative test device which comprises an aircraft model, a force measuring balance, a motion reversing mechanism, a supporting rod, a pushrod and a hydraulic cylinder, wherein the hydraulic cylinder is installed in an inner cavity in one side of the supporting rod fixing end, and the other end of the supporting rod is connected with the motion reversing mechanism; an output end of the hydraulic cylinder is connected with an input end of the motion reversing mechanism through the push rod; and one end of the force measuring balanceis connected with an output end of the motion reversing mechanism, and the other end is connected with the aircraft model. The high-speed wind tunnel lag of wash derivative test device can directly measure a lag of wash derivative generated by heave / translation acceleration, achieves the separation of a pure rotation damping derivative and a heave / translation damping derivative, is suitable for the measurement of the lag of wash derivative of a high-speed wind tunnel which has strict requirements for the structural size of a test model and is supported in a tail support mode, and solves the problem of insufficient existing measurement capability of the high-speed wind tunnel.
Description
technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a test device for time difference derivative test of wash flow in a high-speed wind tunnel. Background technique [0002] In the state of high speed and large angle of attack, the flow of the new generation of fighter jets presents strong nonlinear characteristics, and the derivative of jet lag changes greatly with the angle of attack, even accompanied by the change of sign. The traditional method of directly replacing the derivative produced by the pure rotational angular rate with the rotational forced oscillation test data, or determining the ratio of the pure rotational derivative and the time difference derivative based on calculation and experience has been unable to meet the model requirements. [0003] In recent years, major low-speed wind tunnels at home and abroad have established relatively complete dynamic derivative test systems, which can measu...
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IPC IPC(8): G01M9/04
CPCG01M9/04
Inventor 付增良张旭张石玉梁彬周家检周平
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS