导弹多喷口侧向喷流流动数值模拟

NUMERICAL SIMULATION OF MULTI-NOZZLE LATERAL JETS WITH SUPERSONIC FLOW AROUND A MISSILE

针对典型导弹外形,通过求解三维Navier-Stoke方程开展了多喷口喷流与超声速来流的复杂干扰流动数值模拟,研究了来流马赫数、来流攻角、喷口数量及位置、喷流压力比对流场结构和弹体表面流动的影响.结果表明,相邻喷口间会产生明显的干扰,来流马赫数、攻角、喷口数量及位置和喷流压力都会对喷流与主流之间的干扰以及导弹表面流动产生明显影响,且在沿流向布置的多喷口中,最上游喷口决定了喷口前的流场结构.

Numerical simulations of the interaction between multi-nozzle jets and a supersonic external flow were performed for a typical missile body geometry,by solving the three-dimensional Navier-stokes equations.The simulations were made to investigate the effects of different flow conditions and jet parameters,such as Mach number,angle of attack,jet pressure and the number and location of flow nozzle,on the structure of flow field and flow on the body surface near the nozzles.The simulation results show that the considerable interaction arises between the neighboring jets,and Mach number,angle of attack,the number and location of nozzles,and jet pressure have a significant effect on the interaction between the jets and the mainstream as well as the flow on the surface.The jet closest to the nose determines the structure of upstream flow of jet.