600MW汽轮机隔板汽封流场与汽流激振力的数值计算  

Numerical Calculation on Flow Field of Diaphragm Seals and Steam-exciting in 600MW Steam Turbine

作　　者：丁学俊[1] 刘顺[1] 黄来 翟俊海[1] 李勇[1] 

机构地区：[1]华中科技大学,湖北430074 [2]湖南电力试验研究院,湖南410007

出　　处：《汽轮机技术》2010年第5期348-350,共3页Turbine Technology

基　　金：湖北省自然科学基金项目(2008CDB310)

摘　　要：通过建立600MW超临界机组隔板密封三维模型,应用Fluent软件模拟计算与汽缸同心的转子在有无旋转的情况下对隔板汽封蒸汽泄漏量的影响;研究了在转速3 000r/min,转子无偏心,进出口压力改变时隔板汽封蒸汽泄漏量的变化情况;并分析偏心距对泄漏量和汽流激振力的影响规律。计算结果与分析表明,进出口压比对迷宫密封性能的影响是随着进出口压比的增大泄漏量增大;偏心距增大泄漏量增大,同时汽流激振力也随之增大。This paper presents an analytical study of changes in steam leakage due to the rotor, which is concentric with cylinder,in the rotating or non-rotating case by using Fluent software to simulate the three-dimensional diaphragm gland model of 600MW supercritical unit. We also do researches about the impact of changes pressure in entrance/exit on the steam leakage with the concentric rotor in speed of 3000r/min and the eccentricity＇ s impact on leakage and Alford＇ s force. The results also show that steam leakage is proportional to the ＇ratio of entrance and exit pressure no matter what the rotor movement. When the eccentricity increases, the leakage and Alford＇s force also increase.

关 键 词：隔板汽封 汽流激振 CFD FLUENT 

分 类 号：TK263.2[动力工程及工程热物理—动力机械及工程]