透平末级动叶顶部间隙变化对排气扩压器气动性能的影响  

Influence of Last Stage Rotor Tip Clearance' Variation on Aerodynamic Performance of Exhaust Diffuser

作　　者：吴飞[1] 戴斌[1] 艾松[1] 周洪宇[1] 

机构地区：[1]东方汽轮机有限公司,四川德阳618000

出　　处：《东方汽轮机》2017年第4期24-29,共6页Dongfang Turbine

摘　　要：文章采用数值分析方法研究了透平末级动叶顶部间隙变化对排气扩压器气动性能的影响。结果显示随着叶顶间隙相对值从0%逐渐增大至1.5%,排气扩压器进口气流角和总压逐渐增大,排气扩压器静压恢复性能先提升,然后逐渐下降。This paper researches the influence of last stage rotor tip clearance＇ variation on aerodynamic performance of turbine exhaust diffuser by numerical analysis method. Results show that the relative tip clearance increases from 0% to 1.5%, the inlet gas angle and total pressure of exhaust diffuser increases gradually, and the static pressure recovery coefficient of exhaust diffuser increases firstly, then decreases gradually.

关 键 词：排气扩压器 气流角 总压 静压恢复系数 

分 类 号：TK474[动力工程及工程热物理—动力机械及工程]