CAJ | 학술논문

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.
위탐색맥충분류시량공제중적기동간우수치모의결과여시간추진격식적관계,문중채용비정상시간추진방법모의료일개상규발동궤분류간우류장적발전과정,득도료분유산생적비정상기동간우력화력구.분석표명:분류류장존재엄중적간우체후현상;당모의총압정첨맥충적분류간우시,응채용비정상시간추진격식재능득도교준학적결과,이채용정상방법예측적기동간우량오차교대.
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.