氦氙离心压气机叶顶间隙形态对气动性能的影响  

Influence of form of tip gap on aerodynamic performance of centrifugal compressor using mixture of helium and xenon

作　　者：王国杰 刘学峥 高杰[1] 郑群[1] WANG Guojie;LIU Xuezheng;GAO Jie;ZHENG Qun(Collegc of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,哈尔滨150001

出　　处：《航空动力学报》2020年第6期1304-1314,共11页Journal of Aerospace Power

基　　金：国家自然科学基金(51979052,51779051);航空动力基金(6141B09050392);国家科技重大专项(2017-Ⅲ-0010-0036)。

摘　　要：针对氦氙混合工质离心压气机,通过数值模拟研究了叶顶径向间隙与轴向间隙高度的独立变化和不同间隙形态分布对压气机内部流场流动状态和性能产生的影响,总结氦氙混合工质离心压气机叶顶间隙不同高度和形态分布对其性能的影响规律。结果表明:叶顶间隙高度的增大会降低氦氙离心压气机的近喘振工况和设计工况效率。单独增加径向间隙(0.1~0.4 mm)使堵塞流量范围拓宽了3.88%,堵塞工况性能有所改善;单独增大轴向间隙对堵塞工况性能则无影响。渐缩式叶顶间隙分布使离心压气机效率较均匀分布提高0.23%。The tip leakage flow directly affects the performance of the centrifugal compressor. The influence of the independent change of the radial and axial tip gaps and the influence of the distribution of the tip gap on the centrifugal compressor internal flow field and performance were studied by numerical simulation. The influence law of different height and shape of the centrifugal compressor tip gap on its performance was summarized. Result showed that increasing the centrifugal compressor gap would reduce the efficiency at near surge condition and design condition;increasing the radial gap solely, from 0.1 mm to 0.4 mm, could broaden the choke mass flow range by 3.88% and improve the performance of the centrifugal compressor near blockage condition;increasing the axial gap solely had no effect on the performance at near choke condition. The shrinking distribution of tip gap increased the efficiency of the centrifugal compressor by 0.23%.

关 键 词：氦氙混合工质 离心压气机 叶顶间隙 流动特性 气动性能 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]