论文摘要
In order to study influence of tongue clearance on the hydraulic performance of double support vortex pump,three dimensional flow model with symmetric variable size tongue clearance was established by changing section parameter of tongue clearance,and applied to numerically simulate the steady inner flow in a vortex pump based on fixed working conditions and impeller through ANSYS FLUENT.The numerical results show the influence of tongue channel with two sections（non-uniform and uniform sections）on flow field characteristics in vortex pump.Firstly,the variation of tongue channel section changes the vortex structure distribution in circumferential flow channel.Specifically the spiral forward vortex structure in the circumferential direction shifts to large radius side with increasing tongue width.Secondly,the circumferential velocity gradient and axial pressure gradient both diminish with the increase of the tongue section,and the inlet/outlet pressure difference and velocity distribution also reduce with increasing tongue channel section.Finally,for vortex pump with non-uniform section of tongue channel,the head diminishes and the efficiency remains constant approximately with the increase of the tongue width,while the head and the efficiency both diminish for uniform section of tongue channel.
论文目录
文章来源
类型: 期刊论文
作者: Xiang-yang Li,Wan-qiang Chen,Sheng-dun Zhao
来源: Defence Technology 2019年04期
年度: 2019
分类: 工程科技Ⅱ辑,基础科学
专业: 地球物理学,机械工业,水利水电工程
单位: Pump Equipment Engineering Research Center of Shaanxi Province, Xi'an Aeronautical University,School of Mechanical Engineering, Xi'an Jiaotong University
基金: the National Natural Science Foundation of China(No. 51575420),the Local Service Special Project of the Education Department of Shaanxi Province,China (No. 14 JF011),the Special Fund Project of Major Science and Technology Innovation of Shaanxi Province,China (No. 2017ZKC0124,No. 2018TP-17),Xi’an Science and Technology project,China (No. 201805032YD10CG16(5)) for the support
分类号: TH38;TV136.2
页码: 645-654
总页数: 10
文件大小: 2349K
下载量: 6
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