通过模型实验,研究利用发动机排气的引射作用,将外界部分冷空气引入发动机机舱,对后机身结构进行冷却的效果;研究被引射的冷气流在机尾罩后部与发动机排气混合后,向外排出时,对排气的红外辐射、噪声和推力的影响。 Through the model experiment, the effect of using the exhaust of the engine to introduce the cold air into the nacelle to cool the rear fuselage structure is studied. The effect of the induced cold air flow on the rear of the tail cap and the engine exhaust After mixing, the outward discharge, the exhaust infrared radiation, noise and thrust effects.