轮盘侧空腔流动结构及其对离心压缩机气动性能的影响  

Flow Structure in Impeller Backside Cavity and its Effect on Aerodynamic Performance of a Centrifugal Compressor

作　　者：秦瑞鸿[1] 孙一颉 王晟旻 琚亚平[1] 张楚华[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]沈阳鼓风机集团股份有限公司,沈阳100869

出　　处：《工程热物理学报》2016年第11期2349-2354,共6页Journal of Engineering Thermophysics

基　　金：国家科技支撑计划项目课题(No.2012BAA08B06);教育部博士点基金项目(No.20120201110064)

摘　　要：本文以离心压缩机轮盘侧空腔流域为研究对象,通过数值计算,研究了设计工况下空腔流动结构及对主流区域的影响机制。结果表明,空腔及密封内部流动表现为四类旋涡结构;空腔流动对叶轮内部流动及气动性能的影响较小,但明显增加了扩压器内的流动损失,致使压缩机级性能显著下降。研究工作为深入了解空腔与通流部件间的相互影响规律提供理论依据,为完善离心压缩机气动性能预测模型奠定基础。In this paper, the flow structure within the centrifugal impeller backside cavity and its effect on the main flow field are numerically investigated. The results show that there are four kinds of vortices inside the backside cavity and the seal, which have little influence on the impeller internal flow or the impeller aerodynamic performance, but significantly increase flow losses within the diffuser, leading to the reduced compressor stage performance. The present work provides theoretical reference for the deep understanding of mutual influence between the impeller backside cavity and the throughflow parts, and also lays foundation for the improvement of the performance prediction model for the centrifugal compressor.

关 键 词：轮盘侧空腔 流动结构 离心压缩机 气动性能 

分 类 号：TH452[机械工程—机械制造及自动化]