|
|
|
| Design on variable-pitch inducer based on numerical simulation for cavitation flow |
| Kong Fanyu， Zhang Hongli， Zhang Xufeng， Wang Zhiqiang |
| (Technical and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China) |
|
|
|
|
Abstract To study the relationship between the variable-pitch coefficient and the inducer performance, based on the hydraulic calculation method of the inducer, the formula of variable-pitch inducer were programmed by Visual Basic 6.0 software to provide three groups of parameters with different variable-pitch coefficient. The flow field of three variable-pitch inducer models was numerically simulated by cavitation flow model and mixing two-phase flow model by Fluent software. The distribution of pressure and the cavitation volume fraction at suction surface were taken out. The main characteristics of the interior flow field were described by comparing with three groups of data, the relation between variation regularity of inducer pitch and the inducer performance was given. The anti-cavitation performance was worse with the variable-pitch coefficient increasing, the static pressure decreased with the axial length of inducer increasing. The performance of mode 1 was greater, the results of test showed that the pump unit with the model 1 variable-pitch inducer can improve the anti-cavitation performance.
|
|
Received: 01 August 2009
Published: 30 January 2010
|
|
|
|
| [1]Spence R,Amaral-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.[2]Okita K,Ugajin H,Matsumoto Y.Numerical analysis of the influence of the tip clearance flows on the unsteady cavitating flows in a three-dimensional inducer[J].Journal of Hydrodynamics,2009,21(1):34-40.[3]Chen Hongxun,Guo Jiahong.Numerical simulation of 3-D turbulent flow in the multi-intakes sump of the pump station[J].Journal of Hydrodynamics,2007,19(1):42-47.[4]Li Yaojun,Wang Fujun.Numerical investigation of performance of an axial-flow pump with inducer[J].Journal of Hydrodynamics,2007,19(6):705-711.[5]许友谊,奚伟永,杨敏官.高速诱导轮三维非定常湍流数值模拟[J].排灌机械,2008,26(3):59-63.Xu Youyi,Xi Weiyong,Yang Minguan.Numerical simulation of 3D unsteady turbulent flow in high-speed inducer[J].Drainage and Irrigation Machinery,2008,26(3):59-63.(in Chinese)[6]孔繁余,黄建军,吕毅,等.离心泵变螺距诱导轮的开发[J].排灌机械,2008,26(3):10-14.Kong Fanyu,Huang Jianjun,L?Yi,et al.Development of variable-pitch inducers in centrifugal pump[J].Drainage and Irrigation Machinery,2008,26(3):10-14.(in Chinese)[7]孙建,孔繁余,季建刚.变螺距诱导轮的设计计算[J].农业机械学报,2007,38(2):102-105.Sun Jian,Kong Fanyu,Ji Jiangang.Design calculation on variable-pitch inducer[J].Transactions of the Chinese Society for Agricultural Machinery,2007,38(2):102-105.(in Chinese)[8]朱荣生,付强,李维斌.低比转数离心泵叶轮内汽蚀两相流三维数值模拟[J].农业机械学报,2006,37(5):75-79.Zhu Rongsheng,Fu Qiang,Li Weibin.Numerical simulation of 3D two-phase cavitation flow in impeller of the low specific speed centrifugal pump[J].Transactions of the Chinese Society for Agricultural Machinery,2006,37(5):75-79.(in Chinese) |
|
|
|
