旋转导弹横向喷流/外流干扰的数值模拟研究

Numerical Simulation of Interaction Between Lateral Jet and External Flow over Spinning Missile

对喷流/外流干扰流动机制及其引起的气动特性的变化研究是采用横向喷流控制技术中控制系统设计的重要环节。旋转弹喷流干扰力放大因子受到的旋转影响不可忽视。采用CFD技术对带有两股前后布置的横向喷流旋转弹干扰流场进行了数值模拟。分析了旋转、喷流流场及不同转速下的力放大因子,结果表明,在正攻角时,力放大因子随转速增大而增大,负攻角时随转速增大而减小。

Proper prediction of force amplification factor is very important for the design of control system in a missile adopting lateral jet control technology. The Influence of rotating on the force amplification factor cannot be neglected. The interaction between two lateral jets and flow in a spinning missile was studied with numerical simulation, and the influence of revolving speeds for the force amplification factor was discussed. The results show that the force amplification factor increases with the increase of rotation speed at positive attack angle, and reduces with the increase of rotation speed at negative attack angle.