Results of a numerical study of the flow structure in the rectangular duct of a model air inlet with the interaction of the shock wave generated by the inlet cowl with the turbulent boundary layer on the inner duct surfaces are reported. A configuration involving a convergent entrance section and a constant-cross-section throat was analyzed. The numerical simulation of the three-dimensional flow with free-stream Mach number M = 4 was performed on the basis of the Reynolds-averaged Navier-Stokes equations and the k-ω SST model of turbulence. As a result of the calculations, the limit streamlines and the distributions of static pressure on the duct surfaces, as well as the distributions of total pressure and the fields of Mach number in duct cross sections were obtained. The structure of the flow is analyzed and the possibility of occurrence of longitudinal vortex structures in the corner region of the intake-duct throat is shown.

报告了模型进气道矩形导管内流动结构的数值研究结果，其中进气道罩产生的冲击波与导管内表面湍流边界层相互作用。分析了包括会聚的入口部分和恒定横截面的喉部的构造。基于雷诺平均Navier-Stokes方程和k-ω对自由流马赫数M = 4的三维流动进行了数值模拟SST湍流模型。作为计算的结果，获得了管道表面上的极限流线和静压力分布，以及管道横截面中的总压力分布和马赫数场。分析了流动的结构，并显示了在进气管的拐角区域出现纵向涡旋结构的可能性。