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| Numerical analysis of effects of splitter blades on cavitation performance in a centrifugal pump |
| Zhang Yunlei, Yuan Shouqi, Zhang Jinfeng, Feng Yaoning, Mao Jieyun |
| National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract The pump cavitation performance will be influenced by the additional splitter blades because the shape of the impeller inlet channel is changed. In order to investigate the influences, four impeller schemes were presented based on a model pump IS50-32-160, one without splitter blades and another three with splitter blades of different inlet diameters. By using the CFD technique, numerical simulations were carried out to investigate the characteristics of internal flow and the pump cavitation performances at different NPSHA. The results show that the cavitation performance of pump is improved by the additional splitter blades, and that the proper selection of the inlet diameter of splitter blades contribute to the degree of improvements of the cavitation performance of pump, which even could avoid the blocking at the impeller inlet and vortex cavitation inside the water passage effectively, and that the cavitation performance reaches its best when the inlet diameter of splitter blades is 0.725D2 for the pump model under our investigation.
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Received: 03 September 2014
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| [1]袁寿其. 低比速离心泵理论与设计[M]. 北京: 机械工业出版社, 1997: 123-133.[2]袁寿其, 叶丽婷, 张金凤, 等. 分流叶片对离心泵内部非定常流动特性的影响[J]. 排灌机械工程学报, 2012, 30(4): 373-378. Yuan Shouqi, Ye Liting, Zhang Jinfeng, et al. Influe-nce of splitter blades on unsteady flow characteristics in centrifugal pump [J]. Journal of Drainage and Irrigation Machinery Engineering, 2012, 30(4): 373-378.(in Chinese)[3]Yuan Shouqi, Zhang Jinfeng, Yuan Jianping, et al. Effects of splitter blades on the law of inner flow within centrifugal pump impeller [J]. Chinese Journal of Mechanical Engineering, 2007, 20(5):59-63.[4]袁寿其, 何有世, 袁建平, 等. 带分流叶片的离心泵叶轮内部流场的 PIV 测量与数值模拟[J]. 机械工程学报, 2006, 42(5): 60-63. Yuan Shouqi, He Youshi, Yuan Jianping, et al. PIV measurements and numerical simulations of flow in centrifugal pump impellers with splitting vanes [J]. Chinese Journal of Mechanical Engineering, 2006, 42(5):60-63.(in Chinese)[5]Gölcü M, Pancar Y, Sekmen Y. Energy saving in a deep well pump with splitter blade [J]. Energy Conversion and Management, 2006, 47(5): 638-651.[6]Gölcü M. Artificial neural network based modeling of performance characteristics of deep well pumps with splitter blade [J]. Energy Conversion and Management, 2006, 47(18): 3333-3343.[7]Asuaje M, Bakir F, Kergourlay G. 3D quasi-unsteady flow simulation in a centrifugal pump-comparison with the experimental results[C]//Proceedings of the ASME Heat Transfer/Fluids Engineering Summer Conference, 2004: 1081-1090.[8]Kergourlay G, Younsi M, Bakir F, et al. Influence of splitter blades on the flow field of a centrifugal pump: Test-analysis comparison [J]. International Journal of Rotating Machinery, 2007:1-2.[9]Shigemitsu T, Fukutomi J, Kaji K, et al. Unsteady internal flow conditions of mini-centrifugal pump with splitter blades [J]. Journal of Thermal Science, 2013, 22(1): 86-91.[10]潘中永, 袁寿其, 刘瑞华, 等. 离心泵复合叶轮短叶片偏置设计研究[J]. 排灌机械, 2004, 22(3): 1-4. Pan Zhongyong, Yuan Shouqi, Liu Ruihua, et al. Research on design for splitting vanes of compound centri-fugal pump impeller [J]. Journal of Drainage and Irrigation Machinery Engineering, 2004, 22(3): 1-4.(in Chinese)[11]张金凤, 袁寿其, 付跃登, 等. 分流叶片对离心泵流场和性能影响的数值预报[J]. 机械工程学报, 2009, 45(7): 131-137. Zhang Jinfeng, Yuan Shouqi, Fu Yuedeng, et al. Numerical forecast of the influence of splitter blades on the flow field and characteristics of a centrifugal pump [J]. Chinese Journal of Mechanical Engineering, 2009, 45(7): 131-137.(in Chinese)[12]张金凤. 带分流叶片离心泵全流场数值预报和设计方法研究 [D]. 镇江: 江苏大学流体机械工程技术研究中心, 2007.[13]关醒凡. 现代泵理论与设计[M]. 北京: 中国宇航出版社, 2011:230-360. |
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