1 前言向火箭发动机喷管的超音速部分喷射二次流体使其改变推力方向的二次喷射推力方向控制(SITVC)方法主要用于难使整个发动机作方向运动的固体火箭。SITVC的性能受二次流体的种类、喷管的膨胀比、喷射流量、喷射位置,喷射孔形状等多种喷射参数的影响。二次流体使用液体时(LITVC),可通过喷射剂的蒸发在喷射 1 Introduction The SITVC method, which sprays secondary fluid to the supersonic part of a rocket motor nozzle to change the thrust direction, is mainly used for solid rockets that make it difficult to move the entire engine in the direction. The performance of SITVC is influenced by various injection parameters, such as the type of secondary fluid, the expansion ratio of the nozzle, the injection flow rate, the injection position, the shape of the injection hole, and the like. When the secondary fluid is liquid (LITVC), it is sprayed by the evaporation of the propellant