环形叶栅内利用非定常激励减少分离区损失的研究  

Research on the effects of unsteady excitation on enhancing performance of annular cascade

作　　者：邱亚希[1] 葛敬东[1] 周海[1] 陆亚钧[1] 

机构地区：[1]北京航空航天大学动力系,北京100083

出　　处：《流体力学实验与测量》2003年第1期18-23,共6页Experiments and Measurements in Fluid Mechanics

基　　金：国家重点实验室基金项目(编号50176001)

摘　　要：阐述了在环形扩压叶栅内利用非定常激励减少分离区损失的实验研究成果。在测得各个工况下环形叶栅的分离旋涡频谱特性的基础上,采用施加声激励的实验手段,系统研究了扩压环形叶栅内流动与非定常扰动之间相互作用的机理,证实了一定条件下的非定常扰动能促使叶栅分离区的减小,从而降低总压损失,达到提高气动性能的目的。分别从激励频率和强度的角度出发,探索了影响激励效果的途径。This paper presents the results of the experimental investigation on the effects of internal acoustic excitation on enhancing performance of the annular cascade. Based the rearch work of the frequence characteristics of the annular cascade, we investigated the mechanism of the interaction between the unsteady interference and the flow in the annular cascade systematically by means of employing unsteady excitation. The result of reseach confirmed that the aerodynamic performance of turbomachine would be improved amazingly if the interaction of unsteady interference in the flow field can be reasonably organized. We studied the approach to the acoustic excitation effect from the angle of frequence and intensity of excitation.

关 键 词：环形叶栅 非定常激励 脱落频率 非定常分离流 总压损失 压气机 

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]