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| Numerical calculation and optimal design of centrifugal pumpwith space guide vanes |
| Cong Xiaoqing, Wang Guanghui， Yuan Danqing, Jia Ziqiang |
| (School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China) |
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Abstract Based on Navier-Stokes equations and standard k-ε turbulence model, the threedimensional turbulent flow in a centrifugal pump with space guide vanes was numerically simulated by using a SIMPLEC algorithm. The internal flow field of a centrifugal pump with entire flow, annular space and space guide vanes under design condition was analyzed, and the experiment was carried out to examine the simulation results. The results showed that the pressure of suction surface of impeller blades near the inlet area was lowest and negative pressure appeared. Higher impact loss was found in the annular space between impeller and space guide vanes. The highspeed rotating fluid from impeller outlet flowed into the guide vanes through annular space, the velocity near the inlet of space guide vanes was high, and there existed secondary flow near the leading edge of the space guide vane suction surface. The calculation and experimental results coincided well, and the maximum error was less than 15% between the numerical calculation results and experimental data under the same flow，which was in the acceptable limits and proved the effectiveness of numerical calculation. The research results provide a theoretical reference for geometric parameters optimization of the space guide vanes.
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Received: 20 March 2010
Published: 30 November 2010
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| [1]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,2010,28(1):22-24.Liu Jiangrui,Wang Dongmei,Su Qiqin.Improvement design and numerical simulation of ship cooling pump[J].Drainage and Irrigation Machinery,2010,28(1):22-24.(in Chinese)[2]杨敏官,顾海飞,刘栋.液下泵内三维湍流流动的数值模拟[J].机械工程学报,2008,44(3):160-165.Yang Minguan,Gu Haifei,Liu Dong.Numerical simulation of 3D turbulent flow in underwater pump[J].Journal of Mechanical Engineering,2008,44(3):160-165.(in Chinese)[3]曹卫东,李悦,张晓娣.低比转速污水泵叶片包角对水力性能的影响[J].排灌机械,2009,27(6):362-365.Cao Weidong,Li Yue,Zhang Xiaodi.Low specific speed pump blade angle of water on the hydraulic properties[J].Drainage and Irrigation Machinery,2009,27 (6):362-365.(in Chinese)[4]关醒凡.现代泵技术手册[M].北京:宇航出版社,1995.[5]Muggli F A,Holbein P,Dupont P.CFD calculation of a mixed flow pump characteristic from shutoff to maximumflow[J].Journal of Fluids Engineering,2002,124(3):798-802.[6]Sinha M,Pinarbasi A,Katz J.The flow structure during onset and developed states of rotating stall within a vaned diffuser of a centrifugal pump[J].Journal of Fluids Engineering,2001,123(3):490-499.[7]赵秋霞.导流壳几何参数选取及其对泵性能的影响[J].太原理工大学学报,2002,33(4):414-416.Zhao Qiuxia.Diversion selected geometric parameters of the shell and its impact on pump performance[J].Journal of Taiyuan University of Technology,2002,33 (4):414-416.(in Chinese)[8]杨敏官,李辉,高波,等.离心泵内流场计算及空间导叶内流动分析[J].流体机械,2008,36(7):16-19.Yang Minguan,Li Hui,Gao Bo,et al.Numerical calculation of turbulent flow in a centrifugal pump and flow field analysis to vaned diffuser[J].Fluid Machinery,2008,36 (7):16-19.(in Chinese)[9]杨敏官,贾卫东,刘栋,等.混流式输卤泵内部湍流场的研究[J].农业机械学报,2005,36(6):46-50.Yang Minguan,Jia Weidong,Liu Dong,et al.Research and analysis of turbulent flow in mixed-flow bittern transfer pump[J].Transactions of the Chinese Society for Agricultural Machinery,2005,36(6):46-50.(in Chinese)[10]Roberge J A.Use of computational fluid dynamics(CFD) to model flow at pump intakes[D].Worcester Polytechnic Institute,1999. |
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