摘要
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 computation result of 2D subsonic compressor cascade indicated that if the interaction of unsteady disturbs in the flow field was reasonably organized the disordered unsteady flow can be effectively controlled. The frequency of shedding vortex was got when the boundary condition is steady. Basing on this frequency we simulated the wake impacting effect by changing the inlet boundary condition. The result of research confirmed that the aerodynamic performance of cascade can be improved if the interaction of unsteady disturbs in the flow field was reasonably organized, of which the physical mechanisms was also analysed.
出处
《空气动力学学报》
CSCD
北大核心
2003年第3期295-300,共6页
Acta Aerodynamica Sinica
基金
国家自然科学基金(10072008)
高等学校博士学科点专项科研基金(2000000615)的资助。
