立式轴流泵装置进出水流道多方案优选  

Multiple schemes optimization for inlet and outlet flow of vertical axial flow pump device

作　　者：孙丹丹 高慧 王刚 杨帆 汤方平 SUN Dandan;GAO Hui;WANG Gang;YANG Fan;TANG Fangping(Xuzhou Water Conservancy Architectural Design Institute,Xuzhou 221000,Jiangsu;Yangzhou University,Yangzhou 225127,Jiangsu)

机构地区：[1]徐州市水利建筑设计研究院,江苏徐州221000 [2]扬州大学,江苏扬州225127

出　　处：《江苏水利》2018年第11期35-40,共6页Jiangsu Water Resources

基　　金：江苏省自然科学基金项目(BK20150457);国家科技支撑计划项目(2015BAD20B01-02);江苏省研究生科研与实践创新计划项目(SJCX18_0800)

摘　　要：为了提高立式轴流泵装置的水力性能,基于雷诺时均N-S方程和标准k-ε湍流模型,采用CFD技术对轴流泵装置肘形进水流道和虹吸式出水流道进行多方案的数值优选,获得了不同方案各流量工况时流道的内流场和静压分布图,对比分析了不同方案进出水流道的水力损失。结果表明:在叶片安放角为-4°,最优工况Q_d=214.3 r/min时,肘形进水流道加长1.0 m,流道最低点高程下降0.2 m为优选方案,进水流道出口流速均匀度最高,水力损失相对较小;虹吸式出水流道长度不变,驼峰位置不变,驼峰高度降低,流道出口流速加大,流道出口底部高程抬高0.45 m为优选方案,该方案消除了虹吸式出水流道下降段的回流现象,同时水力损失相对较小。In order to improve the hydraulic performance of the vertical axial flow pump device,based on the Reynolds time averaged N-S equation and the standard k-e turbulence model,the numerical optimization of multiple schemes on the elbow inlet and siphon outlet passages of the axial flow pump was carried out by CFD technology.The internal flow field and the static pressure distribution diagram of the flow channel in different flow conditions were obtained,and the hydraulic loss of inlet and outlet flow of different schemes was compared and analyzed.The results showed that when the angle of the blade was-4°,the optimal operating condition was Qd=214.3 r/min,the elbow shaped inlet channel was lengthened by 1.0m,and the lowest elevation of the flow channel was decreased 0.2m,which should be an optimal solution,and the flow velocity uniformity was the highest and the hydraulic loss was relatively small.The length of the siphon outlet channel was constant,the hump position was unchanged,the hump height was reduced,the flow velocity of the outlet of the flow channel was increased and the elevation of the outlet at the bottom of the runner outlet was 0.45m,which should be a preferred scheme.The scheme eliminated the backflow phenomenon of the descending section of the siphon outlet channel,and the hydraulic loss was relatively small at the same time.

关 键 词：轴流泵 泵装置 流道 优化 数值计算 

分 类 号：TV675[水利工程—水利水电工程]