跨音转子叶尖泄漏流动的DES研究  

DES Investigations of Tip Leakage Flow in a Transonic Compressor Rotor

作　　者：苏祥宇 任晓栋 李雪松[1] 顾春伟[1] SU Xiang-Yu;REN Xiao-Dong;LI Xue-Song;GU Chun-Wei(Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and PowerEngineering, School of Mechanical Engineering, Tsinghua University, Beijing 100084, China)

机构地区：[1]清华大学能源与动力工程系热科学与动力工程教育部重点实验室

出　　处：《工程热物理学报》2019年第7期1491-1497,共7页Journal of Engineering Thermophysics

基　　金：国家科技重大专项(No.2017-11-0007);国家自然科学基金(No.51806118);国防重点实验室基金(No.6142A0501020317)

摘　　要：本文针对某1.5级跨音压气机转子,使用分离涡模拟方法(DES)对其进行了不同工况下的数值模拟,重点关注了叶顶泄漏流动的形态结构、非定常性以及与激波的相互作用。结果表明,分离涡模拟方法能够比雷诺时均方法更好地捕捉泄漏涡的涡系结构和流场细节,且在近失速工况下能够捕获到泄漏流动的非定常现象。泄漏流动的非定常扰动主要发生在在80%叶高以上的叶片压力面侧,对转子总体性能产生了影响。泄漏涡通过激波后结构出现了较大改变,泄漏涡和激波作用之后导致涡破碎可能是叶顶流动中非定常性的根本来源。The DES method was adopted in the numerical investigations of the transonic rotor of a 1.5-stage compressor at different working conditions.The detailed structures of the tip leakage flow,the unsteadiness characteristics and the interaction with the shock were mainly focused.The DES results have a better resolution for the vortex structure and detailed flow field of the tip leakage flow than RANS results.Unsteadiness at near stall point was successfully captured by DES method.Fluctuations in the tip leakage flow were located at the pressure side of the blade above 80% span,which have a large impact on the overall performance of the rotor.An abrupt change was found in the tip leakage vortex after passing through the shock.The vortex breakdown resulted from the interaction process may be the fundamental cause of the unsteadiness in the tip flow field.

关 键 词：分离涡模拟 叶尖泄漏 跨音压气机 非定常性 

分 类 号：TK14[动力工程及工程热物理—热能工程]