Effects of particle diameter on erosion wear performance of slurry pump
Wang Jiaqiong1, Ye Qun1, Yan Kewei2, Feng Yaoning1, Yu Xunan1
1.National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Packaging Engineering Room of Machinery Ministry, Patent Examination Cooperation Jiangsu Center of the Patent Office, SIPO, Suzhou, Jiangsu 215011, China
Abstract：In order to investigate the influence of particle diameter on erosion wear performance of slurry pump delivering solid-liquid two-phase flow medium, the motion trajectory of particles with diffe-rent particle diameter is calculated based on Lagrange method, k-ε turbulence model, discrete phase zero equation model and Finnie ductile materials erosion model. The impact velocity, impact angle and other parameters between solid particle and machine surface were evaluated by numerical simulation, and the wear rule of solid-liquid two-phase flow in slurry pump are discussed. According to the simulation results,the particles with small diameter distributed relatively uniform in the flow path, had a very small probability of in collision with the hydraulic components, and the erosion wear of the blade was relatively weak. By contrary,the solid particle with large diameter was apt to move toward to the pressure surface and impacted the leading edge of the blade.The impact angle and velocity of the particles with large diameter was greater to the blades and the volute circumferential wall than the small ones, and the erosion wear of the blade was relatively strong. And the large particles might in collision with the hydraulic components many times in the flow channel, causing serious erosion.
[1]Zhang Junqiu,Han Zhiwu,Yin Wei, et al. Numerical experiment of the solid particle erosion of bionic confi-guration blade of centrifugal fan[J]. Acta Metallurgica Sinica:English Letters,2013,26(1):16-24.[2]吴波.渣浆泵固液两相三维湍流及冲蚀磨损特性研究[D].长沙:中南大学机电工程学院,2010.[3]赵啸冰.渣浆泵内清水流场及离散固体颗粒轨迹的模拟与研究[D]. 北京:清华大学热能系,2002.[4]Help Navigator. ANSYS, Release 13.0 ANSYS CFX-Solver Theory Guide[M].New York: Ansys Inc,2010.[5]汪家琼,蒋万明,孔繁余,等.基于Particle 模型固液两相流离心泵流场数值模拟[J].排灌机械工程学报,2013,31(10):846-850. Wang Jiaqiong, Jiang Wanming, Kong Fanyu,et al. Numerical simulation of solid-liquid two-phase turbulent flow in centrifugal pump based on particle model[J]. Journal of Drainage and Irrigation Machinery Enginee-ring,2013,31(10):846-850.(in Chinese)[6]Dosanjh S, Humphrey J A C. The influence of turbulence on erosion by a particle-laden fluid jet[J]. Wear,1985, 102(4): 309-330.[7]刘娟,许洪元,唐澍,等.离心泵内固体颗粒运动规律与磨损的数值模拟[J]. 农业机械学报,2008,39(6):54-69. Liu Juan,Xu Hongyuan,Tang Shu,et al. Numerical simu-lation of erosion and particle motion trajectory in centri-fugal pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(6):54-69.(in Chinese)[8]吴波,严宏志,徐海良,等.渣浆泵内固相颗粒冲蚀特性的数值模拟[J]. 中南大学学报:自然科学版,2012,43(1):124-129. Wu Bo, Yan Hongzhi, Xu Hailiang, et al. Numerical simulation about erosion characteristics of solid particle in slurry pump [J].Journal of Central South University:Science and Technology,2012,43(1):124-129.(in Chinese)[9]李昳,何伟强,朱祖超,等.脱硫泵固液两相流动的数值模拟与磨损特性[J].排灌机械,2007,27(2):124-128. Li Yi,He Weiqiang,Zhu Zuchao, et al.Numerical simulation of solid-liquid two-phase flow and abrasion cha-racteristics in desulfurization pump[J]. Journal of Drainage and Irrigation Machinery,2007,27(2):124-128.(in Chinese)[10]Li Yi, Zhu Zuchao, He Zhaohui, et al. Abrasion cha-racteristic analyses of solid-liquid two-phase centrifugal pump[J]. Journal of Thermal Science, 2011,20(3): 283-287.
