农业机械学报2012，Vol.43Issue(9)：37-42,6.DOI:10.6041/j.issn.1000-1298.2012.09.008
分流叶片对螺旋离心泵径向力的影响
Numerical Simulation on Radial Hydraulic Forces for Screw-type Centrifugal Pump with Splitter Blade
摘要
Abstract
In order to solve the overlarge radial hydraulic forces on the impeller of screw-type centrifugal pump with single blade , splitter blade was added. Based on Navier - Stokes equations and k - ε turbulent model, three-dimensional unsteady flow field of the pump was simulated numerically to the screw-type centrifugal pump with and without splitter blade. Pressure fluctuations in the outlet of pump, radial hydraulic forces on the impeller and volute were obtained at different flow rates. The analysis results indicated that the pressure wave in the outlet of pump, radial hydraulic forces wave on the impeller and volute were always periodic in the two models, impeller blade passing frequency was the dominant frequency. Compared with the result without splitter blade at different flow rates, the period decreased to a half, the amplitudes of pressure fluctuations in the outlet of pump was smaller, the radial hydraulic forces on the impeller decreased a lot, the distribution of radial hydraulic forces qn the impeller vector coordinates were more symmetry, and almost ellipses, the radial hydraulic forces on volute increased a little, but the amplitudes of which was decreased, and the high-frequency components were also fewer. The analysis results indicate that the adding of splitter blade in impeller of screw-type centrifugal pump with single blade can not only decrease the radial hydraulic forces on the impeller, but also decrease oscillations in volute as well.关键词
螺旋离心泵/径向力/分流叶片/压力脉动/数值模拟Key words
Screw-type centrifugal pump/ Radial hydraulic forces, Splitter blade/ Pressure fluctuation, Numerical simulation分类
机械制造引用本文复制引用
袁寿其,周建佳,袁建平,张金凤,徐宇平..分流叶片对螺旋离心泵径向力的影响[J].农业机械学报,2012,43(9):37-42,6.基金项目
国家自然科学基金资助项目(50979034)和江苏省高校自然科学研究资助项目(09KJB570001) （50979034）
