跨音压气机机匣冷却流动控制方法研究  

Investigation of Casing Cooling for Flow Control in the Transonic Axial Compressor

作　　者：刘隆刚 任晓栋 李雪松[1] 顾春伟[1] LIU Long-Gang;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 Power 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12期2797-2805,共9页Journal of Engineering Thermophysics

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

摘　　要：近年来轴流压气机非绝热效应逐渐得到学者们的关注,已有研究表明,采用冷却可以提高压气机整体性能。本文在跨音轴流压气机中针对壁面冷却机理进行探讨,并分别针对跨音转子Rotor 37以及某F级燃气轮机压气机首级模化1.5级实验台开展壁面冷却流动控制方法数值研究。在保证压气机相同进口流量时,在单排跨音转子Rotor 37动叶上游机匣处采用壁面冷却,能够有效减小当地音速及增大流速,从而增大叶顶区域激波前相对马赫数,进而增强激波,提高压气机在设计工况点的增压能力。进一步,在1.5级压气机中考察多排环境下壁面冷却作用,冷却分别应用于机匣及进口导叶上,研究结果表明,壁面冷却同样可以提高压气机气动性能。对比机匣冷却与进口导叶冷却两种方式,可知其机理不同,在跨音压气机中机匣冷却具有简便易行且效果显著的特点。In recent years,the non-adiabatic effect in axial compressors has been investigated.It shows that cooling on compressor surfaces can improve the overall performance.In this paper,the mechanism of cooling effect on the transonic flow is studied.Then,casing cooling is applied in a transonic compressor rotor Rotor 37 and a one and a half stage transonic compressor modelling the F class gas turbine first stage,respectively.Numerical investigation is conducted at the peak efficiency point.With cooling casing,local speed of sound significantly decreases and relative Mach number in front of the shock near the tip increases,which strengthens the shock and improves the pressure rise capability.Further,differences between cooling on the inlet guide vane(IGV) and cooling on the casing is studied.In the transonic compressors,casing cooling has a significant effect on the performance with a less cost of manufacture.

关 键 词：压气机 机匣 冷却 流动控制 激波 

分 类 号：TK14[动力工程及工程热物理—热能工程]