| 汽轮机高压级叶顶间隙流的特性分析 |
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| 引用本文： | 曹丽华,胡鹏飞,李涛涛,李勇,周云龙.汽轮机高压级叶顶间隙流的特性分析[J].中国电机工程学报,2011,31(23). |
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| 作者姓名： | 曹丽华 胡鹏飞 李涛涛 李勇 周云龙 |
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| 作者单位： | 东北电力大学能源与动力工程学院,吉林省吉林市,132012 |
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| 基金项目： | 吉林市科技发展计划资助项目(201030003); 东北电力大学研究生创新基金资助~~ |
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| 摘 要： | 以某300Mw汽轮机高压级为研究对象，采用带剪切应力传输（shearstresstransmission，sst）的K-w sst湍流模型，应用SIMPLEC算法对不同叶顶间隙下的泄漏流动进行数值模拟，分析了泄漏涡的产生、发展及与通道涡的干涉情况，并研究了3种叶顶间隙下，动叶叶项处复杂的流动和涡系情况。结果表明，压力面附近的流体由于压力面和吸力面的压力差作用进入叶顶间隙，泄漏到吸力面处，与主流掺混形成泄漏涡。随着叶顶间隙的增加，泄漏涡强度变大，导致通道涡靠近叶片中部。同时，泄漏涡涡核离吸力面更远，使通道内的流动环境更恶劣，引起更大的级内损失。
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| 关 键 词： | 汽轮机 叶顶间隙 叶顶泄漏涡 数值模拟 |
Analysis on Flow Characteristic in Blade Tip Clearance in High-pressure Stage of Steam Turbine |
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| CAO Lihua,HU Pengfei,LI Taotao,LI Yong,ZHOU Yunlong.Analysis on Flow Characteristic in Blade Tip Clearance in High-pressure Stage of Steam Turbine[J].Proceedings of the CSEE,2011,31(23). |
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| Authors: | CAO Lihua HU Pengfei LI Taotao LI Yong ZHOU Yunlong |
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| Affiliation: | CAO Lihua,HU Pengfei,LI Taotao,LI Yong,ZHOU Yunlong(School of Energy and Power Engineering,Northeast China Dianli University,Jilin 132012,Jilin Province,China) |
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| Abstract: | This paper reports a numerical study on leakage flow with different blade tip clearances in high-pressure stage of a 300 MW steam turbine.The k-w sst turbulence model was adopted,and SIMPLEC arithmetic was used.The formation,development of leakage vortex and the interference between leakage vortex and passage vortex were analyzed.Also,the complex flow and vortex system in moving blade tip were studied,comparing the performance with different three kinds of blade tip clearances.The results show that due to t... |
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| Keywords: | steam turbine tip clearance tip leakage vortex numerical simulation |
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