【摘要】 应用骑波机理论设计了一个设计Ｍａ数为２的“Ｃａｒｅｔ”进气口，并试验研究带有该进气口的矩形大Ｓ弯扩压器在地面起飞状态下的流动特性。通过壁面流谱观察，有关截面的总压恢复系数分布图和速度矢量图等分析了进气口和Ｓ弯扩压器流动特性。并与带有常规进气口的该大Ｓ弯扩压器性能进行对比。试验结果表明在地面起飞状态下及相同扩压器出口平均Ｍａ数下，带有“Ｃａｒｅｔ”进气口的大Ｓ弯扩压器出口总压恢复系数略高于带有常规进气口的大Ｓ弯扩压器的值，但前者的周向总压畸变指数△σｏ和ＤＣ６０均大于后者的相应值更多还原

【Abstract】 A "caret" inlet was designed for Mach number 2 0 according to theory of waverider.The experimental investigation on flow characteristics of a large S-shaped diffuser with such an inlet has been carried out.The flow characteristics of the inlet and the S-shaped diffuser have been analysed by means of flow visulization on the walls,measurements of total pressure recovery distribution and velocity vector plots in the sections concerned.The performance of this large S-shaped diffuser was compared with that of the same diffuser but with conventional inlet.It is shown that,under takeoff condition and at the same Ma 2 of the diffusers,the total pressure recovery of the former is a little higher but the circumferential total pressure distortion index △ σ o and DC60 of the former are larger than that of the latter.更多还原