导弹侧向喷流干扰特性数值模拟

Numerical Investigation of Lateral Jet Interaction Flowfield on Missile

针对导弹侧向喷流与超声速来流相互干扰引起的复杂流场,采用有限体积离散方法求解N-S方程,研究了不同状态下的侧向喷流干扰特性,分析了干扰流场结构和气动增益系数随来流参数的变化特性。计算结果表明,侧向喷流与来流相互干扰后,喷流对导弹表面压力产生明显影响,且干扰范围和强度随参数变化明显,喷流气动增益系数规律复杂且呈非线性变化,并在某些条件下产生不利干扰。

The complex interaction flowfield induced by lateral jet with supersonic freestream is investigated by numerical simulation on a slender missile.The N-S equations are solved by finite volume methods.The flow characteristics and amplification factors with flow parameters are analyzed.The results show that the surface and spatial structures of interaction flowfield are changed obviously by the lateral jet interaction.The interaction region and intensity are varied under different flight conditions.The rule of amplification factors is complex and nonlinear,producing disadvantage interaction under some condition.