| 修锉叶片出口对离心泵非定常性能的影响 |
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| 引用本文： | 李福鑫,符杰,范飞,王兴林.修锉叶片出口对离心泵非定常性能的影响[J].中国农村水利水电,2021(4):171-176. |
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| 作者姓名： | 李福鑫 符杰 范飞 王兴林 |
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| 作者单位： | 西华大学能源与动力工程学院;国能大渡河检修安装有限公司 |
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| 基金项目： | 西华大学研究生创新基金项目(ycjj2018038);四川省科技厅应用基础项目(2016JY0187)。 |
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| 摘 要： | 为探究修锉叶片出口对离心泵非定常性能的影响,对一台比转速为180的离心泵叶片出口的压力面和吸力面分别进行两种厚度修锉,采用ANSYS-CFX软件的标准k-ε湍流模型对各方案进行非定常数值模拟,对比分析不同叶片出口修锉方案对离心泵外特性、内部流场、压力脉动以及径向力的影响。研究结果表明:离心泵叶片出口压力面修锉方案PS1、PS2使离心泵的水力效率分别提高1.1%和1.5%,但在一定程度上会降低扬程,吸力面修锉方案SS1、SS2使离心泵的扬程分别提高6.3%和7.1%,但在一定程度上会降低水力效率;对吸力面进行修锉可以提高蜗壳扩散段壁面和蜗壳出口的静压值,同时降低叶轮及蜗壳流道中速度分布的均匀性,但对压力面进行修锉则相反;4种修锉方案均能在一定程度上改善离心泵蜗壳流道内的压力脉动,减小压力脉动的能量损耗,其中方案PS2效果最好;修锉方案PS2、SS1、SS2均能在一定程度上减小叶轮径向力同时增大隔舌径向力,其中方案SS2的影响效果最为明显。综合分析,叶片出口压力面修锉方案PS2使离心泵性能最佳。
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| 关 键 词： | 离心泵 叶片出口修锉 压力脉动 径向力 |
The Effect of Filing Blade Outlet on the Unsteady Performance of Centrifugal Pump |
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| LI Fu-xin,FU Jie,FAN Fei,WANG Xing-lin.The Effect of Filing Blade Outlet on the Unsteady Performance of Centrifugal Pump[J].China Rural Water and Hydropower,2021(4):171-176. |
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| Authors: | LI Fu-xin FU Jie FAN Fei WANG Xing-lin |
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| Institution: | (School of Energy and Power Engineering,Xihua University,Chengdu 610039,China;Guoneng Dadu River Repair&Installation Co.,Ltd,Leshan 614900,Sichuan Province,China) |
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| Abstract: | In order to explore the effect of the blade outlet filing on the unsteady performance of a centrifugal pump,the pressure surface and suction surface of the blade outlet of a centrifugal pump with a specific speed of 180 are filed with two thicknesses respectively.The standard k-εturbulence model of ANSYS-CFX software is used to simulate the unsteady flow of each scheme.Comparison and analysis of the effects of different blade outlet filing schemes on the external characteristics,internal flow field,pressure fluctuation and radial force of centrifugal pump.The research results show that the centrifugal pump blade outlet pressure surface filing scheme PS1,PS2 can increase the hydraulic efficiency of the centrifugal pump by 1.1%and 1.5%respectively,but it will reduce the head to a certain extent.The suction surface filing scheme SS1,SS2 can make the head of the centrifugal pump increase by 6.3%and 7.1%respectively,but it will reduce the hydraulic efficiency to a certain extent.The static pressure of the diffusion section and the outlet of the volute can be increased by filing the suction surface,meanwhile,the uniformity of velocity distribution in impeller and volute channel is reduced,but the opposite is true for filing on the pressure surface.All of the four schemes can improve the pressure pulsation in the volute flow path of centrifugal pump to a certain extent,and reduce the energy loss of pressure pulsation,of which PS2 is the best.PS2,SS1 and SS2 can reduce the radial force of the impeller and increase the radial force of the tongue to a certain extent,and SS2 has the most obvious effect.Comprehensive analysis shows that PS2 is the best plan to file the pressure surface at the blade outlet,which makes the performance of centrifugal pump best. |
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| Keywords: | centrifugal pump blade outlet filing pressure pulsation radial force |
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