摘要
选取一台比转速为425的斜流泵为研究对象,研究叶片进口修圆对斜流泵性能的影响。首先建立叶片工作面、背面进口修圆和无修圆2种叶轮的三维模型,然后采用ICEM进行非结构四面体网格划分,最后基于Ansys CFX 15.0对2种方案进行CFD定常计算,得到了模型泵设计工况下的外特性以及内部流动信息。依据CFD计算结果分析了叶片进口修圆对斜流泵性能的影响。性能预测结果表明叶片进口处修圆会使模型泵的扬程降低1.6%,效率降低0.8%。内流分析结果表明叶片进口修圆后可以改善叶片进口处的压力和速度分布,但容易导致在叶顶间隙处出现强漩涡,从而使泵性能下降。
To analyze the influence of blade inlet trimming on performance of mixed flow pumps, a mixed flow pump with a special speed of 425 is chosen as the research model. Firstly two impeller model is established, including inlet trimming at blade face and blade back, then ICEM unstructured tetrahedral mesh is used, and no trimming, the characteristics and internal flow of the two model pumps at the design point are calculated by numerical simulation based on ANSYS CFX 15.0. The results obtained by CFD can provide a reference for the influence of blade inlet trimming on performance of mixed flow pump. The results show that blade inlet trimming model can reduce the head by 2.3%, and reduce the efficiency by 0.8%. Blade inlet trimming will reduce cavitation, improve internal flows, but easy to vortex at the blade tip clearance.
作者
朱文瑞
吴贤芳
黄从兵
刘厚林
吕云
ZHU Wen-rui1, WU Xian-fang2, HUANG Cong-bing1, LIU Hou-lin3, LU Yun3(1. Jiangsu Aerospace Hydraulic Equipment Corporation, Yangzhou 225600, Jiangsu Province, China ; 2. Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China ; 3.School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, Chin)
出处
《中国农村水利水电》
北大核心
2018年第2期144-146,173,共4页
China Rural Water and Hydropower
基金
国家自然科学基金(51579117)
江苏省成果转化项目(BA2013127)
江苏省产学研项目(BY2014123-07)
江苏高校优势学科建设工程资助项目(PAPD)
关键词
斜流泵
进口修圆
水力性能
数值模拟
mixed flow pump
blade inlet trimming
hydraulic performance
numerical simulation
作者简介
朱文瑞（1983-），男，工程师，主要从事大型叶片泵的性能优化研究。E-mail：zwr2017zwr@163．com。
