关键词: 流场畸变;激波干扰;频谱分析;进气道

Abstract: The control technique of flow dynamic distortions due to strong shock with MU, B, m 1.68-1.74 turbulent boundary layer interaction in a two-dimensional convergent divergent duct are investigated under some conditions of the boundary layer, including the effects of bleed slot structures and the slot locations on flow dynamic distortion downstream of the interaction. In this paper the power spectral density and the probability density of the total pressure signals and the pressure-time history at several particular locations along the profiles of the flow turbulence distribution at the exit of the divergent section of duct also are analysed.The experimental results show that the flow dynamic distortion downstream of the interaction region can be efficiently improved by means of bleeding the shock-induced separate flow in the interaction region with bleed flowWbl/Wm =2.8-3.5%.

Key words: Flow distortion;Shock wave interaction;Spectrum analysis;Inlet