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| 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 |
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Abstract 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.
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Received: 11 April 2014
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| [1]杨猛. 两相流流动的模拟及两相流模型的研究[D]. 天津:天津大学化工学院,2005.[2]贾晓奇,崔宝玲,陈德胜,等.离心式纸浆泵内部流动的数值模拟[J].浙江理工大学学报, 2013,30(4): 514-519. 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)[3]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 Engineering,2013,31(10):846-850.(in Chinese)[4]李红,袁寿其,袁建平, 等.基于泵内纸浆悬浮液数值计算的纸浆泵设计[J].江苏大学学报:自然科学版,2007,28(1): 51-55. 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)[5]黄列群,袁静,陈义红, 等.螺旋式纸浆离心泵内部流动的数值模拟[J].机电工程,2007, 24(12): 50-52. Huang Liequn, Yuan Jing, Chen Yihong, et al. Nume-rical simulation on internal flow in the screw centrifugal pulp [J]. Mechanical & Electrical Engineering Magazine, 2007, 24(12): 50-52.(in Chinese) [6]Peng Guangjie, Wang Zhengwei, Xiao Yexiang, et al. Abrasion prediction of Francis turbine based on liquid-solid two-phase fluids simulation [J]. Engineering Failure Analysis, 2013,33: 327-335.[7]罗先武,许洪元,严志敏,等.渣浆泵ADI叶片的磨蚀特性分析[J].水力发电学报,2001(1):79-84. 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)[8]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.[9]汪家琼,蒋万明,孔繁余.固液两相离心泵内部流场的数值模拟与磨损特性[J].农业机械学报,2013,44(11):53-60. 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)[10]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.[11]崔巧玲,李昳,金守泉.非定常固液两相流对双流道泵磨损性能的影响[J].浙江理工大学学报, 2012, 29(4): 543-548. 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)[12]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. |
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