摘要
假设绕小幅振动旋成体所导致的物理量的变化为平均定常扰动量的高阶小量,那么将物理量(速度、密度及压力)摄动展开后代入Euler方程,便导出了前两阶摄动量的控制方程和相应的边界条件,用TVD格式进行数值求解,得到了平均定常跨音速流(零阶)和基频(一阶)非定常分量的数值解。
The unsteady transonic flow around an oscillating body of revolution with a small amplitude is numerically simulated by using the Euler equations and TVD scheme. In the present study, suppose the variations induced by the oscillating body are the higher order small terms than the steady flow ones, then the dominating equations and boundary conditions are given from the pertured expansion of the Euler equations. The present method is examined here for the first time.
基金
国家自然科学基金
关键词
数值计算
非定常流动
跨音速流动
oscillating body of revolution with a small amplitude, numerical method, transonic flow, unsteady flow
