两级轴流压气机流场内流动分离及旋涡运动  

Flow separation and vortex motion in flow filed of two stage axial compressor

作　　者：王祥锋[1] 颜培刚[1] 俞李斌[2] 韩万金[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001 [2]重庆大学动力工程学院,重庆400030

出　　处：《空气动力学学报》2014年第2期177-183,202,共8页Acta Aerodynamica Sinica

基　　金：国家自然科学基金委创新研究群体(51121004);中国博士后基金(AUGA4100205011)

摘　　要：对两级扩压叶栅的内部流场开展了详细的数值模拟,同时引入拓扑分析理论,从涡动力学的角度对不同工况下扩压叶栅内的流动分离和旋涡运动进行定性分析。对两级压气机三个不同工况下流场的分析结果表明:相比分离范围的变化,分离形态的变化对压气机性能的影响更显著。当流动向失速点靠近时,对于动叶栅,主要表现为分离范围的不断增加;对于静叶栅,不仅分离范围增加,而且分离形态也发生了变化。在压气机叶栅中,通道涡强度较弱,对整个流场特性不起主要作用,而尾缘涡对压气机性能具有较大影响。To understand the detailed internal flow law of two stage compressor flow filed clearly,the detailed numerical simulation is carried out for the internal flow field of a two stage compressor of some multistage subsonic axial compressor.Simultaneously,the topology analysis theory is introduced,the flow separation and vortex development are qualitatively analyzed based on the vortex dynamics theory.The flow field analyses of the two-stage compressor at three different operating conditions show that,compared to the change of the separation range,the change of separation type plays a more important role on the compressor performance.When the flow approaches to the stall point,the separation range is continuously increased for the rotor cascade.While for the stator cascade,the separation range is increased,and in the mean time,the separation type is also changed.In a compressor cascade,the passage vortex intensity is weak and is not a primary role in the whole flow field characteristics,and the trailing vortex has a greater effect on compressor performance.

关 键 词：压气机 旋涡结构 流动分离 流谱 拓扑分析 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]