Numerical simulation of solid-Liquid two-phase flow and abrasion characteristics in desulfurization pump
LI Yi1,HE Weiqiang1,Zhu Zuchao1,Zhang Yuliang2,Cui Baoling1
(1.Faculty of Mechanical Engineering and Automation,Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China;2.College of Mechanical and Energy Engineering,Zhejiang University,Hangzhou,Zhejiang 310027,China)
Abstract：Particle concentration distribution,velocity distribution and abrasion characteristics were studied by using numerical simulation of the solid-liquid two -phase flow in a desulfurization pump.The volume fraction of solid particles along the blade pressure sides is higher than the suction sides and increases when the particle diameter increases.Particles in the volute are mainly distributed near the wall.The volume fraction increases with the increase of particle diameter.The relative-velocity vector direction is basically along the blade surface.This indicates that it′s the sliding wear in the blades.Particles collide with the volute wall with a small angle.The angle increases with the increase of the particle diameter.Solid particles move to the volute outlet along walls while they extrude the walls by the effect of centrifugal force.So serious abrasion appears in the volute.The particles moving track is disorder near the position of volute tongue.The impact wear occurs near the tongue region.Numerical simulation results are consistent with the actual situation.It follows that the calculating method is feasible.
[1]Patankar N A,Joseph D D.Modeling and numerical simulation of particulate flows by the Eulerian-Lagrangian approach[J].International Journal of Multiphase Flow,2001,27(10):1659-1684.[2]Patankar N A,Joseph D D.Lagrangian numerical simulation of particulate flows[J].International Journal of Multiphase Flow,2001,27(10):1685-1706.[3]Long Fan,Zaisha Mao,Yundong Wang.Numerical simulation of turbulent solid-liquid two-phase flow and orientation of slender particles in a stirred tank[J].Chemical Engineering Science,2005,60(24):7045-7056.[4]Hui Gao,Liejin Guo,Ximin Zhang.Liquid-solid separation phenomena of two-phase turbulent flow in curved pipes[J].International Journal of Heat and Mass Transfer,2002,45(24):4995-5005.[5]李仁年,徐振法,韩伟,等.渣浆泵内部流场数值模拟与磨损特性分析[J].排灌机械,2007,25(2):5-8.Li Rennian,Xu Zhenfa,Han Wei,et al.Numerical simulation of interior flow and wear character in slurry pumps[J].Drainage and Irrigation Machinery,2007,25(2):5-8.(in Chinese)[6]杨敏官,高波,李辉,等.旋流泵内盐析两相流场的计算及试验研究[J].机械工程学报,2008,44(12):42-48.Yang Minguan,Gao Bo,Li Hui,et al.Simulation and experimental research on salt-out two-phase flow field in a vortex pump[J].Chinese Journal of Mechanical Engineering,2008,44(12):42-48.(in Chinese)[7]杨敏官,刘栋,贾卫东,等.离心泵叶轮内部三维湍流流动的分析[J].江苏大学学报:自然科学版,2006,27 (6):524-527.Yang Minguan,Liu Dong,Jia Weidong,et al.Analysis on turbulent flow in impeller of centrifugal pump[J].Journal of Jiangsu University:Natural Science Edition,2006,27(6):524-527.(in Chinese)[8]高波.旋流泵液固两相流场的计算及PDPA实验研究[D].江苏:江苏大学,2007.
