Abstract：The flow field of a residual heat removal pump, which was meshed by hexahedronconstructional and tetrahedron non constructional grids based on a multiblock approach, was calculated numerically with the quasi steady Multiple Frame Reference method by solving Reynolds Averaged Navier-Stokes equations. In order to enhance reliability of numerical results, applicability of four turbulence models for predicting the overall parameters such as head and efficiency was evaluated, and the results of SST turbulence model showed the best agreement with experimental data. The flow field in the impeller meridional channel and blade to blade surface were investigated, some distortion flow phenomenon caused by unsuitable local structure were detected such as reverse flow and secondary flow around the blade leading edge and between adjacent blades which badly added flow losses．According to the results, on the precondition of keeping guide vane and volute unchanged, improvements were executed by adjusting the impeller meridional curvature, the blade inlet angle and the blade profile. The results show that the interior flow field of the optimized impeller are improved evidently, it can satisfy the design target of both flow rate and head, and foremost, efficiency of the design point is raised about 7%.
常书平， 王永生. 基于三维湍流数值模拟的余热排出泵叶轮优化设计[J]. 排灌机械工程学报, 2011, 29(5): 397-400.
Chang Shuping, Wang Yongsheng. Optimal design of impeller for residual heat removal pumps based on numerical simulation of 3D turbulent flow. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(5): 397-400.
[1] 孔繁余,王 婷,黄道见,等.核电站余热排出泵热冲击回路设计[J].排灌机械工程学报,2010,28(4): 291-294.Kong Fanyu,Wang Ting,Huang Daojian,et al. Design for thermal shock loop of residual heat removal pump[J].Journal of Drainage and Irrigation Machinery Engineering,2010,28(4): 291-294.(in Chinese)[2] Bulten N,Verbeek R. CFD simulation of the flow through a water-jet installation［C］∥Proceedings of the International Conference on Water-jet Propulsion.London： ［s.n.］,2004.[3] 田 辉,郭 涛,[JP2]孙秀玲,等.离心泵内部动静干涉作用的数值模拟[J].农业工程学报,2009,40(8): 92-95.[JP]Tian Hui,Guo Tao,Sun Xiuling,et al. Numerical simulation of unsteady flow in a centrifugal pump[J].Transactions of the Chinese Society for Agricultural Machinery,2009,40(8): 92-95.(in Chinese)[4] Yuan Shouqi,Ni Yongyan,Pan Zhongyong,et al. Unsteady turbulent simulation and pressure fluctuation analysis for centrifugal pumps[J].Chinese Journal of Mechanical Engineering,2009,22(1): 64-69.[5] Kitano M. Numerical study of unsteady flow in a centrifugal pump[J].Journal of Turbomachinery,2005,127(2): 363-371.[6] 胡敬宁,刘三华,江 伟,等.基于CFD的高温减压塔底泵次级叶轮优化设计[J].排灌机械工程学报,2010,28(2): 127-131.Hu Jingning, Liu Sanhua,Jiang Wei,et al. Optimal design for secondary impeller of decompression tower bottom pump with high temperature by CFD[J].Journal of Drainage and Irrigation Machinery Engineering,2010,28(2): 127-131.(in Chinese)[7] Spence R, Teixeira J.A CFD parametric study of geometrical variations on the pressure pulsations and performance characteristics of a centrifugal pump[J]. Computers & Fluids,2009,38(6): 1243-1257.[8] 刘建瑞,王董梅,苏起钦,等.船用冷却泵的数值模拟与优化设计[J].排灌机械工程学报,2010,28(1): 22-24.Liu Jianrui,Wang Dongmei,Su Qiqin,et al. Improvement design and numerical simulation of ship cooling pump[J].Journal of Drainage and Irrigation Machinery Engineering,2010,28(1): 22-24.(in Chinese)[9] 王福军.计算流体动力学分析——CFD软件原理与应用［M］.北京: 清华大学出版社,2007.
