为探索脉冲喷流矢量控制中的气动干扰数值模拟结果与时间推进格式的关系,文中采用非定常时间推进方法模拟了一个常规发动机喷流干扰流场的发展过程,得到了喷流产生的非定常气动干扰力和力矩。分析表明:喷流流场存在严重的干扰滞后现象;当模拟总压呈尖脉冲的喷流干扰时,应采用非定常时间推进格式才能得到较准确的结果,而采用定常方法预测的气动干扰量误差较大。

In the paper, in order to probe the relation between numerical simulation of aerodynamic effect of lateral impulse jet control and time integration scheme, the 2D general jet flow is simulated with unsteady time integration approach, the unsteady aerodynamic characteristics of missile is acquired. The analyse of result shows that lateral impulse jet flow is greatly unsteady and residual influence. Unsteady integration approach should be used when predict aerodynamic effect of lateral impulse jet which chamber pressure is very sharp with time, the result would be better than that of steady integration approach.