核电站三级循环混流泵的三维湍流数值模拟.pdfVIP

35 3 Vol. 35 No . 3 2009 6 Jo rnal of Lanzho University of Technology J n. 2009 :2009) 核电站三级循环混流泵的三维湍流数值模拟 1 1 1 2 马希金, 张化川, 惠伟安 , 张克危 ( 1. , 730050; 2. , 430074) : 针对某在建核电站三级循环给水混流泵在多工况 高效率运行的要求, 基于雷诺时均 NS 方程标准k湍 流模型和SIMPLE 算法, 对叶轮及蜗壳内部流场进行数值模拟, 并预测其性能曲线. 在清水实验台上进行性能测 试, 实验结果表明数值计算与试验结果吻合较好, 但数值模拟和试验结果均显示该样机效率不达标, 可以通过增大 蜗壳断面面积以及减小叶片进口冲角进 一步提高整机效率. : 混流泵; 叶轮; 蜗壳; 数值模拟 : TH 313 : A Numeric simulation of threedimensional turbulent flow in threestage circulating mixedflow pump in nuclear power plant 1 1 1 2 M A Xijin , ZHAN G H ach an , HUI Weian , ZHA NG Kew ei ( 1. College of Energy and Pow er Engineering, Lanzho U niv. of T ech. , Lanzho 730050, China; 2. School of Energy and Pow er Engineer ing, H azhong Univ. of Scie. and T ech . , W han 430074, China) Abstract: Aimed at the req irement of high efficiency of threestage circ lating mixedflow feedw ater p mp in a n clear pow er plant in constr cting, and based on Reynolds timeaveraged NavierStokes eq a tions w ith the standard kt rb lence clos re models, and SIMPLE algorithm, the inner flow field of the impeller and vol te w as n merically sim lated, and the p mp performance c rves w ere predicted. T he per formance test w as carried o t w ith fresh w ater. It w as show n by the test that the comp tational res lt a greed w ell w ith that of performance test. T he CFD analysis and test res lts, how ever, show ed that the sample p mp co ld not reach the standard efficiency. It w o ld be reasonable that enlargement of sectional area of vol te and red ction of inlet angle of blades might imp