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激波矢量控制喷管矢量角随落压比(NPR)的增大而下降的现象已被许多研究所证实.对NPR影响矢量角机理及基于多缝腔体和多缝辅助注气方法的分离区控制研究,目标是寻求大NPR条件下矢量性能提高的方法.研究表明:NPR影响矢量角的机理主要由于次流下游近壁面分离区由小NPR时的开放型变为大NPR时的封闭型,从而导致由于壁面压差力产生的矢量力减小所致.多缝辅助注气方法可以有效控制分离区在大NPR时保持开放,注气压力为环境压力时可以在不从系统额外引气的条件下提高矢量性能.
The phenomenon that the vector angle of shock vector control nozzle decreases with the increase of the pressure drop ratio (NPR) has been proved by many researches.Analyzing the mechanism of vector angle caused by NPR and the separation based on multi-slit cavity and multi-slit auxiliary gas injection The research of area control is aimed at finding a way to improve the vectorial performance under large NPR conditions.The results show that the mechanism of NPR’s influence on the vector angle is mainly due to the closed type when the downstream wall near the wall is changed from an open type with small NPR to a large NPR type , Resulting in the decrease of the vector force due to the pressure difference of the wall.Multi-slit auxiliary gas injection method can effectively control the separation area to remain open at large NPR, and when the gas injection pressure is the ambient pressure, Improve the vector performance under the conditions.