Prediction of pulp pump erosion characteristic based on solid-liquid two-phase turbulent flow
Yang Lingbo1, Xiao Yexiang2, Tang Bing1, Wang Zhengwei2
1.School of Mechanical Electronic and Information Engineering, China University of Mining and Technology, Beijing 100083, China; 2.State Key Laboratory of Hydroscience and Engineering & Department of Thermal Engineering, Tsinghua University, Beijing, 100084, China
Euler-Euler and Euler-Lagrange two-phase model was applied to simulate the turbulent flow in the pulp pump and to predict the erosion characteristics considering the impact of tip clearance. Euler multiphase model use Particle model to analyze two-phase flow, the wall wear was mainly affected by the slip velocity and the fraction of volume of solid particles. Lagrange multiphase model was applied to predict the wear quantity based on Finnie erosion model. The result of pulp pump′s open impeller under different discharge conditions show that, the Euler model predict blade and front cover wear seriously under the design flow rate, case wear seriously under the small flow rate. The Lagrange model revealed the blade and front cover wear seriously, found the wear rate of blade and front cover increased and then decreased with the discharge rising, the wear rate of back cover and case decreased gradually. These two model predict the impeller and front cover are badly worn,which coincide with the actual phenomenon. Lagrange model can analyze the wear positions and degree quantitatively. This study can provide a reference for the research of pulp pump two-phase flow and erosion prediction.
YANG Ling-Bo-,XIAO Ye-Xiang-,TANG Bing- et al. Prediction of pulp pump erosion characteristic based on solid-liquid two-phase turbulent flow[J]. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(2): 98-103.
He Shaorun. Renovation of external circulation cooling system of turbine guide bearing of high-speed storage unit [J]. Mechanical & Electrical Technique of Hydropower Station, 2010,33(5):1-5.(in Chinese)
杨晓斌. 浅谈水电站转轮巧加泵叶减轻水封磨蚀[J]. 石河子科技,2008(2):51-52.
Jia Xiaoqi, Cui Baoling, Chen Desheng, et al. Numerical simulation of internal flow in centrifugal pulp pump[J]. Journal of Zhejiang Sci-Tech University, 2013,30(4):514-519.(in Chinese)
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 Engineering,2013,31(10):846-850.(in Chinese)
Yang Xiaobin. Reducing the abrasion of the water seal by adding the vane of impeller in hydroelectric station [J]. Shihezi Science and Technology, 2008(2):51-52.(in Chinese)
蔡龙,张丽萍. 浅谈压水堆核电站主泵[J]. 水泵技术,2007(4):1-9.
Li Hong, Yuan Shouqi, Yuan Jianping, et al. Stock pump designed based on numerical simulation of pulp fiber suspension in pump[J]. Journal of Jiangsu University:Natural Science Edition, 2007,28(1):51-55.(in Chinese)
Gao Bo, Liu Dong. Preliminary approach to internal flow measurement scheme of 300MW axial-flow nuclear reactor coolant pump model[J]. Fluid Machinery, 2009,37(1):20-27.(in Chinese)
Luo Xianwu, Xu Hongyuan, Yan Zhimin, et al. Analysis on the wear characteristic of ADI blade for slurry pump[J]. Journal of Hydroelectric Engineering,2001(1):79-84.(in Chinese)
Xiao Yexiang, Fang Bo, Zeng Chongji, et al. Erosion predictions of stock pump impellers based on liquid-solid two-phase fluid simulations[C]//Proceedings of 6th International Conference on Pumps and Fans with Compressors and Wind Turbines, 2013:062005.
Shi Weidong, Zhang Desheng, Guan Xingfan. Numerical and experimental investigation of high-efficiency axial-flow pump [J]. Chinese Journal of Mechanical Engineering, 2010, 23(1): 38-44.
Wang Jiaqong, Jiang Wanming, Kong Fanyu. Numerical simulation of solid-liquid two-phase turbulent flow and wear characteristics of centrifugal pump[J].Transactions of the Chinese Society for Agricultural Machinery,2013, 44(11):53-60.(in Chinese)
Lin L, Wang Y Y. Investigation of scale effect for the computation of turbulent flow around a circular cylinder [J]. Acta Mechanica Sinica, 2013, 29(5):641-648.
Li Yi, Zhu Zuchao, He Zhaohui, et al. Abrasion on characteristic analyses of solid-liquid two-phase centrifugal pump[J].Journal of Thermal Science,2010,20(3):283-287.
Li W G. Effects of blade exit angle and liquid viscosity on unsteady flow in centrifugal pumps [C]//Procee-dings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy.London: SAGE, 2012:580-599.
Cui Qiaoling, Li Yi, Jin Shouquan. The influence of unsteady solid-liquid two-phase flow on the wear performance of double-channel pump[J].Journal of Zhejiang Sci-Tech University,2012,29(4):543-548.(in Chinese)
Steinmann A, Wurm H, Otto A. Numerical and experimental investigations of the unsteady cavitating flow in a vortex pump [J]. Journal of Hydrodynamics, Ser.B, 2010,22(5):324-329.
Lee B E, Tu J Y, Fletcher C A J. On numerical mode-ling of particle-wall impaction in relation to erosion prediction: Eulerian versus Lagrangian method[J]. Wear,2002,252(3/4):179-188.
Ha T W, Choe B S. Numerical simulation of rotordynamic coefficients for eccentric annular-type-plain-pump seal using CFD analysis[J].Journal of Mechanical Scien-ce and Technology, 2012, 26(4): 1043-1048.