| 偏心及部分进汽下密封间隙流体激振力数值研究 |
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| 引用本文： | 郭瑞,杨建刚,曹浩,孙丹.偏心及部分进汽下密封间隙流体激振力数值研究[J].流体机械,2011,39(1). |
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| 作者姓名： | 郭瑞 杨建刚 曹浩 孙丹 |
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| 作者单位： | 东南大学火电机组振动国家工程研究中心,江苏南京,210096 |
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| 基金项目： | 国家“863”计划大型发电机组安全稳定运行关键技术及保障系统研究(2007AA04Z434) |
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| 摘 要： | 喷嘴配汽汽轮机在部分进汽时调节级附近会形成极不均匀的流场,不仅影响调节级动叶轮周力的分布,还会对临近密封间隙内的流场及流体对转子的作用力产生扰动。以某国产300MW汽轮机端部汽封间隙为参考,建立密封间隙CFD模型,求解三维、粘性、可压缩N-S方程,研究了不同进汽方式、偏心情况下流场特性及流体对转子作用力。结果表明:部分进汽的位置、转子的偏心距及两者的相对位置对汽流力的大小、方向和变化趋势产生了较大的影响。在某些部分进汽情况下,偏心距增大也会减小汽流力。
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| 关 键 词： | 部分进汽 CFD 密封间隙 流体激振力 |
Numerical Investigation of Seal Clearance Flow Excited Force under Eccentricity and the Partial Admission Mode |
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| GUO Rui,YANG Jian-gang,CAO Hao,SUN Dan.Numerical Investigation of Seal Clearance Flow Excited Force under Eccentricity and the Partial Admission Mode[J].Fluid Machinery,2011,39(1). |
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| Authors: | GUO Rui YANG Jian-gang CAO Hao SUN Dan |
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| Affiliation: | GUO Rui,YANG Jian-gang,CAO Hao,SUN Dan(National Engineer Research Center of Turbo-Generator Vibration,South EastUniversity,Nanjing 210096,China) |
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| Abstract: | The nozzle governing steam turbine can causes uneven flow field near the governing stage.It affects not only the distribution of blade force but also the flow field and the flow induced force in the nearby seal clearance.A numerical calculation model that base on the structure of a 300MW turbine front shaft seal is set up.The full 3D viscous compressible N-S equation is numerically solved.The flow field in the seal clearance and force to rotor are analyzed under different partial admission modes and eccentr... |
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| Keywords: | partial admission CFD seal clearance flow excited force |
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