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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
A “Caret” air inlet with a designed Ma number of 2 was designed based on the theory of ride - wave machines. The flow characteristics of the rectangular large S - bend diffuser with the air inlet under ground takeoff were studied experimentally. The flow characteristics of the inlet port and the S-bend diffuser were analyzed by the observation of the wall flow spectrum, the distribution of the total pressure recovery coefficient and the velocity vector of the section. And compared with the performance of this large S-bend diffuser with a conventional inlet. The experimental results show that the total pressure recovery coefficient of the large S-bend diffuser with “Caret” inlet is slightly higher than that of the conventional inlet with the average inlet at the same diffuser outlet under ground take-off condition S curved diffuser value, but the former circumferential total pressure distortion index △ σo and DC60 are greater than the corresponding value of the latter