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二维亚声压气机叶栅的数值模拟表明,合理地组织流场中非定常流动的相互作用能有效地控制无序的非定常流动。在定常边界条件下获得流场旋涡脱落的特征频率后,针对此特征频率,通过改变进口边界条件来模拟尾流撞击效应(wakeimpactingeffect,首字母缩写为WIT),证实了合理组织各个非定常扰动的相互作用可以提升叶栅的气动性能,并分析了非定常扰动之间相互作用从而导致气动性能变化的机理。
The numerical simulation of two-dimensional subsonic compressor cascade shows that the unstructured flow interaction in unsteady flow field can be reasonably controlled. After the eigenfrequencies of vortex shedding are obtained under steady boundary conditions, the wake impact of wake is simulated by changing the inlet boundary conditions (wake initial act, initials WIT), which confirms the reasonable organization of each unsteady disturbance The interaction enhances the aerodynamic performance of the cascade and analyzes the mechanism of the interaction between unsteady perturbations leading to changes in aerodynamic performance.