收缩间隙分布对跨声速压气机性能及流场结构影响机理研究  

Study on Mechanism of the Effect of Shrinkage Clearance Distribution on the Performance and Flow Field Structure of Transonic Compressors

作　　者：吴永惠 张成烽 丁冠东 WU Yonghui;ZHANG Chengfeng;DING Guandong(AECC Shenyang Engine Research Institute,Shenyang,China,110015;AECC Gas Turbine Co.,Ltd.,Shenyang,China,110002)

机构地区：[1]中国航发沈阳发动机研究所,辽宁沈阳110015 [2]中国航发燃气轮机有限公司,辽宁沈阳110002

出　　处：《热能动力工程》2024年第9期23-30,70,共9页Journal of Engineering for Thermal Energy and Power

摘　　要：为了进一步拓宽压气机稳定裕度,基于平行间隙分布方案提出25%c,50%c,75%c和100%c 4种收缩间隙分布方案。利用定常数值模拟的方法,探究收缩间隙分布对压气机性能及流场结构的影响机理。研究结果表明:收缩间隙分布能够促进泄漏涡向下游移动,使泄漏涡远离转子叶尖前缘;随着收缩段范围的增加,泄漏涡尺度和压力面附近涡团范围增大,间隙区域的堵塞效应增强;与其他3种收缩间隙分布方案相比,25%c方案能够有效抑制间隙区域的堵塞效应,近失速点总压比和效率基本不变,压气机流量范围得到明显拓宽,压气机稳定裕度改进量(SMI)提升2.28%。In order to further expand the stability margin of the compressor,four shrinkage clearance distribution schemes of 25%c,50%c,75%c and 100%c were proposed based on the parallel gap distribution scheme.The mechanism of the influence of shrinkage clearance distribution on compressor performance and flow field structure was explored using steady-state numerical simulation methods.The research results indicate that the shrinkage clearance distribution can promote the downstream movement of the leakage vortex,keeping it away from the leading edge of the rotor blade tip.As the range of the contraction section increases,the scale of the leakage vortex and the range of vortex clusters near the pressure surface increase,and the blockage effect in the gap area increases.A comprehensive comparison of the four shrinkage clearance distribution schemes finds that the 25%c scheme can effectively suppress the blockage effect in the gap area,and the total pressure ratio and efficiency near the stall point remain basically unchanged.The compressor flow range is significantly expanded,and the compressor stability margin improvement(SMI)is increased by 2.28%.

关 键 词：叶尖间隙 收缩间隙分布 跨声速压气机 间隙改型 

分 类 号：TK474.8[动力工程及工程热物理—动力机械及工程]