Model protective mechanism applied to a buzz wind tunnel test
A protective mechanism and wind tunnel test technology, applied in aerodynamic tests, machine/structural component testing, measuring devices, etc., can solve flow field instability, model destruction, pressure reduction, and Mach number reduction. It takes a certain amount of time and other issues to achieve the effect of reducing test costs, reducing the risk of accidental damage, and ensuring the success of the test
Inactive Publication Date: 2015-12-02
JIANGXI HONGDU AVIATION IND GRP
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However, after the wind tunnel is shut down, the flow field becomes unstable, and it takes a certain amount of time to reduce the pressure and Mach number. The model in high-frequency and large-amplitude vibration is very likely to still be damaged after the order to terminate the test is issued.
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following examples are only used to illustrate the present invention, and are not intended to limit the protection scope of the present invention.
[0021] Such as figure 1 , Figure 1a , Figure 1b , Figure 1c Shown, a kind of model protective mechanism of the present invention that is applied to humming wind tunnel test, it comprises pneumatic cylinder 1, column 2, stop clip 3, solenoid valve 4 and air source 5, one end of stop clip 3 It is a metal plate 6, the outer edge of the metal plate 6 forms a wide-angle slit 7, and the end of the wide-angle slit 7 forms a narrow slit 8, which is used to clamp the additional column 2 of the model; the other end of the stop clip 3 is connected to the air pressure The piston telescopic rod 10 of the actuator 9 is connected, and the two ends of the pneumatic actuator 9 have an interface A11 and an ...
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The present invention discloses a model protective mechanism applied to a buzz wind tunnel test, including a pneumatic actuator cylinder, a stand column, a locking clamp, an electromagnetic valve and a gas source. One end of the locking clamp is a metal plate, the edge of the metal plate forms a wide-angle notch, and an end of the wide-angle notch forms a narrow slit, and the narrow slit is used for clamping the upright column mounted on a model. The other end of the locking clamp is connected with a piston telescopic link of the pneumatic actuator cylinder, two ends of the pneumatic actuator cylinder are provided with a port A and a port B, two ports are respectively connected with a gas source through a gas transporting pipeline, and the electromagnetic valve is mounted on the gas transporting pipeline. The model protective mechanism can restrain model vibration so as to reduce the risk of accidental damage of the model in the phase of unstable flow field or too big model vibration amplitude. The model protective mechanism has a signification for ensuring the safety of the test model, ensuring success of the test, and reducing test cost.
Description
technical field [0001] The invention relates to a model protection mechanism applied to humming wind tunnel tests, which belongs to the field of aircraft design aeroelasticity tests. Background technique [0002] Humming model wind tunnel test is a test that simulates the required real flow field in a high-speed wind tunnel, measures the vibration signal of the model in the flow field through sensors, and obtains the corresponding humming phenomenon and analysis data. The model protection mechanism belongs to the field of aircraft design aeroelasticity test. In the wind tunnel test, correlation analysis is carried out by observing the vibration phenomenon and response of the model in a stable flow field, and the model itself is also designed based on the calculation results in a stable flow field. Therefore, for a stable flow field, the model The vibration response has a certain predictability. However, during the process of starting, stopping, boosting, and increasing Mac...
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Inventor 岳鹏阳陈立勇罗士超王钱伟亓洪玲孙超刘征吴成林魏榕祥项小平李泰安彭志军朱亲强汤庆辉
Owner JIANGXI HONGDU AVIATION IND GRP