动叶间隙对压气机气动性能的影响  

Influence of Tip Clearance Height on Performance in a Compressor Stage

作　　者：段静瑶 肖俊峰[1] 高松[1] 李园园[1] 上官博[1] 蔡柳溪[1] 于飞龙[1] DUAN Jing-yao;XIAO Jun-feng;GAO Song;LI Yuan-yuan;SHANGGUAN Bo;CAI Liu-xi;YU Fei-long(Xi＇an Thermal Power Research Institute Company Limited？Xi＇an 710032？ China)

机构地区：[1]西安热工研究院有限公司,西安710032

出　　处：《汽轮机技术》2018年第5期329-331,381,共4页Turbine Technology

基　　金：国家自然科学基金资助项目(51405384);国家自然科学基金资助项目(51606152)

摘　　要：为研究动叶间隙大小对压气机性能及流动的影响,以一台高亚声速一级半压气机级为研究对象,在设计间隙、0. 5倍、1. 5倍及2倍设计间隙下进行定常三维数值模拟。计算结果表明,随着间隙增大,压气机效率及总压比下降。大间隙下泄漏流增强,导致动叶叶尖及其下游区域损失增加,压气机转子效率随间隙增大而线性下降;同时,泄漏流的增强也恶化了动静叶匹配,导致静叶上端壁产生额外损失,压气机级效率下降幅度大于转子效率。Three-dimensional steady RANS simulations were conducted on a 1. 5 compressor stage with 0. 5,1,1. 5 and 2 times of designed clearances,to study the influence of clearance height on performance and flow. The numerical simulations show that,as the clearance height increases,the compressor efficiency and total pressure ratio drop. At large clearance condition,the increase of leakage flow leads to loss at blade tip and downstream area,and rotor efficiency declines linearly with clearance height increasing. Meanwhile,the stronger leakage flow also deteriorates stage matching,which results in an additional loss at the upper endwall of the stator. Therefore stage efficiency falls more sharply than rotor.

关 键 词：压气机 叶尖间隙 叶尖泄漏流 叶尖损失 性能 

分 类 号：TH453[机械工程—机械制造及自动化]