离心压气机蜗壳非轴对称性影响的研究  

Investigation on Effects of Volute’s Nonaxisymmetrical Geometry in a Centrifugal Compressor

作　　者：李学臣[1] 赵家毅 陈峰[1] 任思源[1] 王志恒[2] 席光[2] LI Xue-Chen;ZHAO Jia-Yi;CHEN Feng;REN Si-Yuan;WANG Zhi-Heng;XI Guang(High Speed Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China)

机构地区：[1]中国空气动力研究与发展中心高速所,绵阳621000 [2]西安交通大学能源与动力工程学院,西安710049

出　　处：《工程热物理学报》2019年第6期1275-1282,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51576153)

摘　　要：本文首先对一台1.5级离心压气机进行非定常数值模拟研究蜗壳非轴对称性对该压气机内部流动的影响结果表明:受蜗壳非轴对称几何影响,压气机内部的瞬态流场呈非轴对称分布,蜗舌的非定常干涉向上游延伸至叶轮进口;叶轮叶片表面的动态压力在蜗舌附近脉动幅值最大,其频域特征揭示该压力主要受蜗舌通过频率与扩压器叶片通过频率影响,且蜗舌影响最大。同时,采用旋转遥测系统测量实验压气机叶轮叶片表面的动态压力,对数值研究结果进行了验证,为离心压气机的优化提供了设计依据。The unsteady numerical simulation was carried out in a 1.5-stage centrifugal compressor to investigate the effects of the volute. It was found that, under the impact of the volute’s non-axisymmetrical geometry, the flow field in the compressor demonstrated a non-axisymmetrical distribution and the unsteady effect arising from the volute could reach upstream till the impeller inlet. The pressure fluctuation on the impeller blade surface would be the highest close to the volute tongue. The frequency-domain analysis showed that the unsteady pressures on the impeller blade were mainly influenced by the passing frequencies of the diffuser blade and the volute,especially by that of the latter. Additionally, the unsteady pressure on impeller blade surface was measured by a novel Rotating Telemetry Measurement System and the numerical results were verified.The conclusions in the paper could provide a basis for the optimization design of centrifugal compressor.

关 键 词：蜗壳 非轴对称几何 离心叶轮 旋转遥测系统 

分 类 号：TK474.8[动力工程及工程热物理—动力机械及工程]