二维亚声扩压叶栅尾流撞击效应的数值模拟  

The numberial reseach of wake impacting effect in 2D subsonic compressor cascad

作　　者：侯安平[1] 周盛[1] 

机构地区：[1]北京航空航天大学动力系,北京100083

出　　处：《空气动力学学报》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。

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.

关 键 词：数值模拟 二维亚声压气机 叶栅 气动性能 尾流撞击效应 旋涡脱落频率 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]