侧向喷流干扰流场建立与消退过程数值模拟

针对高超声速轨控侧向喷流的非定常干扰效应问题，应用非定常数值模拟方法和多重网格加速收敛技术，研究了锥-柱-裙外形轨控侧向喷流干扰流场的建立和消退过程，获得了详细的喷流瞬时干扰流场结构特性，分析了法向力放大系数、干扰力矩系数、法向力系数及俯仰力矩系数随时间的变化特性。研究结果表明：在侧向喷流干扰流场建立和消退过程中气动力变化较大，存在峰谷值；法向力放大系数及干扰力矩系数的定常值和非定常时均值之间存在明显差异。

Numerical Simulation of Establishment/Vanishment Process of Lateral Jet Interaction Flowfield

In order to simulate the hypersonic unsteady orbit-control jet interaction effects, both unsteady numerical simulation method and multi-grid technique are developed. The establishment/vanishment process of the lateral jet interaction flowfield for a cone-cylinder-flare configuration is investigated. Detailed transient jet interaction flowfield structures are obtained. Variable characteristics of normal force amplification factor, interaction moment coefficient and normal force coefficient and pitch moment coefficient with time are analyzed. The results show that the normal force and pitching moment are changing seriously in the establishment/vanishment process of the lateral jet interaction flowfield, the steady solutions and the unsteady time-averaged solutions of normal force amplification factor and interaction moment coefficients are evidently different.