The invention discloses an air inlet channel isolation section flow control device based on the wall plate aeroelastic effect and a design method. Firstly, the model selection of an elastic wallboard material is determined according to pressure oscillation frequency and amplitude; determining the geometric dimension of the elastic wall plate according to the length and form of the shock wave string in the isolation section; and determining the initial mounting position of the elastic wall plate according to the position of the first shock wave structure of the shock wave string. The shock wave string reciprocates back and forth due to the pressure change of the outlet of the isolation section, so that an area with instantaneous pressure higher than, equal to or lower than the pressure of the sealing cavity appears on the surface of the elastic wall plate in the isolation section, and the pressure drives the elastic wall plate to deform and oscillate, so that the oscillation energy of the shock wave string is converted into displacement potential energy and kinetic energy through the elastic wall plate; therefore, the suppression of shock wave string oscillation is realized, and the anti-back pressure capability of the isolation section is improved. According to the invention, the instable phenomenon of shock wave string motion can be inhibited, the anti-back pressure capability of the isolation section can be improved, and the working margin of the hypersonic air inlet duct is expanded.
本发明公开了一种基于壁板气弹效应的进气道隔离段流动控制装置和设计方法。首先根据压力振荡频率和振幅确定弹性壁板材料的选型;根据隔离段内激波串长度和形态确定弹性壁板的几何尺寸;根据激波串的第一道激波结构位置确定弹性壁板的安装初始位置。隔离段出口压力变化使得激波串产生前后往复运动,导致隔离段内弹性壁板表面出现瞬时压力高于、等于或低于密封腔压力的区域,压力驱动弹性壁板产生变形和振荡,使得激波串振荡能量通过弹性壁板转化为位移势能和动能,从而实现对激波串振荡的抑制,达到提高隔离段抗反压能力。本发明能够实现对激波串运动不稳定现象的抑制,能提高隔离段抗反压能力,拓展高超声速进气道的工作裕度。
Air inlet channel isolation section flow control device based on wallboard aeroelastic effect and design method
基于壁板气弹效应的进气道隔离段流动控制装置和设计方法
2022-11-25
Patent
Electronic Resource
Chinese
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