流体机械

2016, v.44;No.534(12) 18-24

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核主泵流体动压型圆形深槽密封的热流耦合分析
Analysis of Themal-fluid Coupling of Hydrodynamic Circular Deep Groove Seal in Reactor Coolant Pumps

李定;孟祥铠;李纪云;
LI Ding;MENG Xiang-kai;LI Ji-yun;Engineering Research Center of Process Equipment and Its Remanufacture,China's Ministry of Education,Zhejiang University of Technology;

摘要(Abstract):

以核主泵流体动压型圆形深槽第二级密封为研究对象,建立包括密封环、端面液膜和密封腔组成的三维跨尺度传热系统。采用Fluent软件,在流固交界面采用强制耦合,求解能量方程和N-S方程,获得端面间液膜、密封环、密封腔的流场分布、压力分布和温度分布,在此基础上研究转速、冲洗量和冲洗进出口位置对三维传热系统的影响。结果表明:冷却冲洗对于密封环的散热有显著效果;深槽能降低密封端面的温度,起到局部的冷却作用;深槽结构以及流体惯性作用,导致深槽两侧存在压力梯度;转速对温度场的影响远大于冲洗量的影响;冲洗进出口位置对密封环、密封腔的温度场影响较大,冲洗进出口位置均存在最优值,进口在无量纲量L/L0为4/7处最优,出口位于动环外周凸台处有较好的冷却效果。
The research use the circular deep grooves hydrodynamic seal as the research object,it was established three dimensional heat transfer across scales system model including sealing ring,liquid membrane and seal chamber. To get the flow field distribution、pressure distribution and temperature distribution of liquid film,sealing ring,seal chamber,using the commercial CFD software Fluent,coupling the fluid-structure interface,solving the energy equation and Navier-Stokes equation. On the basis of the study,taking the rotational speed and flushing location of inlet and outlet into consideration,research the influence to the three-dimensional heat transfer system. The results show that the cooling flush has significant effect to the heat dissipation of sealing ring;Deep groove can reduce the temperature of the seal face,has local cooling effect; the deep groove structure and fluid inertia effect cause the pressure gradient on both sides of deep groove; the rotational speed has huge influence to the temperature field compare to the flushing quantities; flushing location of inlet and outlet has huge influence on temperature field of sealing ring,There exist optimal value of flushing location of inlet and outlet,dimensionless quantity L / L0 equal to 4 /7 is the optimal position of flushing inlet,the outlet position around the rotating ring of outer convex platform has optimal cooling effect.

关键词(KeyWords): 核主泵;深槽密封;跨尺度三维传热;热流耦合
reactor coolant pumps;deep groove seal;three-dimensional heat transfer across scales;thermal-fluid coupling

Abstract:

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基金项目(Foundation): 国家自然科学基金项目(51375449,51005209);; 浙江省自然科学基金项目(LY14E050012)

作者(Author): 李定;孟祥铠;李纪云;
LI Ding;MENG Xiang-kai;LI Ji-yun;Engineering Research Center of Process Equipment and Its Remanufacture,China's Ministry of Education,Zhejiang University of Technology;

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