摘要
为了减少旋涡泵流道内部冲击损失，提升旋涡泵的性能，研究了基于面积不变理论改变旋涡泵流道截面形状的方法。采取流道形状贴合流动状态的策略，改变流道截面形状为M型，利用CFD技术对参考泵和M型截面流道的内部流动进行多工况三维数值模拟分析，对比两者之间的扬程、效率曲线，并分析流道截面的流线图。结果表明，相比矩形流道，M型截面流道在扬程和效率上均有所提升，流道内叶片出口处的乱流有所改善，M型截面流道中液流更加平滑，但是过流面积增加，摩擦损失也随之增大。
An M-type section had been designed to reduce internal shock losses in the channel of votex pump. The reasonable M section was based on the theory of the same area, with the constant height, section of channel sharped like an M was more in line with law of fluid flow. The nearest distance of the wall of channel and the outlet of blades was 1 ram. In order to research the inner flow in channel, computational fluid dynamics software CFX was adopted in the inner flow field analysis. Head, efficiency curve and velocity vector of rectangular and M-type channel were obtained from the simulation. The results show that the head and efficiency have improved; fluid flows more smoothly in the M-type channel; turbulence and small reverse spiral at the outlet of blades is less. However, the friction losses increase with the larger flow area.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2014年第3期77-82,共6页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(51109093、51079063)
国家标准化管理委员会项目(2007A4308-T-604)
江苏高校优势学科建设工程资助项目
江苏省高校自然科学基金资助项目(09KJD570001)
关键词
旋涡泵
流道
冲击损失
摩擦损失
数值模拟
Vortex pump Channel Shock loss Friction loss Numerical simulation
作者简介
王洋，研究员，博士生导师，主要从事流体机械及工程研究，E—mail：pgwy@ujs．edu．cn
