Abstract： Based on continuity equation and motion equation of fluids, the flow field of quasithreedimensional direct problem was solved through iterative calculation for two kinds of stream surfaces. The distribution of axis plane velocity in mediumhigh specific speed centrifugal pump impeller was obtained. Based on the flow field of the direct problem, the inverse problem of centrifugal pump impeller was designed by drawing blade shape with pointbypoint integration, thickening blade and smoothing leading edge of the blade through conformal mapping. The impeller was not finally accomplished until the iterative calculation of direct and inverse problems were converged. The threedimensional flow fields of the centrifugal pump impeller designed were simulated with RNG k-ε turbulent model and SIMPLEC algorithm. The distributions of pressure and velocity field inside the impeller were obtained. The simulation results show that pressure distribution inside the impeller designed here is well uniform. The flow inside impeller is steady without separation. The energy distribution at impeller outlet is reasonable. The impeller designed by this method has superior hydraulic performance.
谭 磊, 曹树良. 中比转速离心泵叶轮的优化设计及数值模拟[J]. 排灌机械工程学报, 2010, 28(4): 282-285.
Tan Lei, Cao Shuliang. Optimal design and numerical simulation for impeller of centrifugal pump with mediumhigh specific speed. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(4): 282-285.
[1]桂绍波,曹树良.离心泵前置导叶预旋调节的理论分析[J].水泵技术,2008 (6):1-6.Gui Shaobo,Cao Shuliang.Theory analysis on centrifugal pump with inlet guide vane[J].Pump Technology,2008 (6):1-6.(in Chinese)[2]谈明高,刘厚林,王勇,等.叶轮外径对离心泵内流影响的CFD分析[J].排灌机械,2009,27(5):314-318.Tan Minggao,Liu Houlin,Wang Yong,et al.CFD analysis on effects of impeller outlet diameter on flow field in centrifugal pump[J].Drainage and Irrigation Machinery,2009,27(5):314-318.(in Chinese)[3]潘中永,谢蓉,曹英杰,等.叶片安放角变化规律对离心泵性能影响分析[J].排灌机械,2009,27(5):319-322.Pan Zhongyong,Xie Rong,Cao Yingjie,et al.Analysis effects of blade angle on centrifugal pump performance[J].Drainage and Irrigation Machinery,2009,27(5):319-322.(in Chinese)[4]牟介刚,李思,郑水华,等.离心泵叶轮出口盖板形状对水力性能的影响[J].排灌机械,2009,27(5):323-326.Mou Jiegang,Li Si,Zheng Shuihua,et al.Relationship between hydraulic performance of centrifugal pump and shape of impeller shroud[J].Drainage and Irrigation Machinery,2009,27(5):323-326.(in Chinese)[5]杨从新,王斌.离心泵在启动阶段的瞬态三维数值模拟[J].排灌机械工程学报,2010,28(2):122-126.Yang Congxin,Wang Bin.3D numerical simulation on transient characteristics of centrifugal pump during starting period[J].Journal of Drainage and Irrigation Machinery Engineering,2010,28(2):122-126.(in Chinese)[6]林恺,曹树良,祝宝山,等.用于高比转速混流泵设计的流场计算[J].清华大学学报:自然科学版,2008,48(2):219-223.Lin Kai,Cao Shuliang,Zhu Baoshan,et al.Flow computations for the design of high specific speed mixed-flow pumps[J].Journal of Tsinghua University:Natural Science Edition,2008,48(2):219-223.(in Chinese)[7]曹树良,梁莉,祝宝山,等.高比转速混流泵叶轮设计方法[J].江苏大学学报:自然科学版,2005,26(3):185-188.Cao Shuliang,Liang Li,Zhu Baoshan,et al.Design method for impeller of high specific speed mix-flow pump[J].Journal of Jiangsu University:Natural Science Edition,2005,26(3):185-188.(in Chinese)[8]张勤昭,曹树良,陆力.高比转速混流泵导叶设计计算[J].农业机械学报,2008,39(2):73-76.Zhang Qinzhao,Cao Shuliang,Lu Li.Research on the guide vane design of high specific speed mixed-flow pump[J].Transactions of the Chinese Society for Agricultural Machinery,2008,39(2):73-76.(in Chinese)[9]Yakhot V,Orszag S A,Thangam S,et al.Development of turbulent models for shear flows by a double-expansion technique[J].Physics of Fluids A,1992,4(7):1510-1520.[10]桂绍波,曹树良,谭磊,等.前置导叶预旋调节离心泵性能的数值预测与试验[J].农业机械学报,2009,40(12):101-106.Gui Shaobo,Cao Shuliang,Tan Lei,et al.Numerical simulation and experiment of inlet guide vane pre-whirl regulation for centrifugal pump[J].Transactions of the Chinese Society for Agricultural Machinery,2009,40(12):101-106.(in Chinese)[11]田辉,郭涛,孙秀玲,等.离心泵内部动静干涉作用的数值模拟[J].农业机械学报,2009,40(8):92-95.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)
