不同翼型轴向积叠的轴流泵水力性能及内部流态  

Hydraulic performance and flow patterns of axial-flow pumps with axial stacking of different airfoil series

作　　者：孙壮壮 王欣宇 石丽建 汤方平[1] SUN Zhuangzhuang;WANG Xinyu;SHI Lijian;TANG Fangping(College of Water Conservancy Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225000, China)

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225000

出　　处：《排灌机械工程学报》2022年第3期217-222,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51376155);江苏高校优势学科建设工程项目;江苏省水利科技计划项目(2017031);扬州市科技计划项目(YZ2018103)。

摘　　要：为了研究叶轮翼型轴向积叠方式对轴流泵水力性能和内部流场的影响,以轴流泵模型ZM25为基础,设计了5种不同方式的翼型积叠方案.保持轮缘处的翼型断面不变,其他翼型断面中心沿斜向直线积叠,积叠角度分别为-8°,-4°,0°,+4°和+8°.基于CFX对5种方案在不同运行工况下的水力性能与内部流态进行预测模拟,并将计算结果与试验测量值进行对比验证.研究结果表明:翼型由负角度积叠时,可以提高泵的扬程,但泵的效率降低;翼型由正角度积叠时,泵的效率提高,但扬程减小;对于泵的内部流场,翼型由负角度积叠时,可以改善叶片背面的压力分布,同时改善泵的空化性能和泵内部沿轴线方向的轴向速度分布,减小泵内的径向流动;翼型由正角度积叠时,可以使轴流泵出口的轴向流动更加均匀.研究结果可为轴流泵的设计提供一定的参考.In order to study the influence of the airfoil series connection on the hydraulic performance and internal flow field of the axial-flow pump,five different airfoil series solutions were designed based on the axial-flow pump model ZM25.Keeping the airfoil section at the shroud unchanged,and the center of other airfoil sections were connected in series along an oblique line,with the series stacking angles were-8°,-4°,0°,+4°and+8°,respectively.Based on CFX,the hydraulic performance and internal flow patterns of the five schemes under different operating conditions were predicted and simulated,and the calculation results were verified and compared with the experimental measured values.The research results show that when the airfoil is connected in series by negative angle,the pump head can be improved,but the efficiency of the pump will be reduced.In addition,when the airfoil is connected by positive angle,the pump efficiency is improved,but the head is reduced.For the internal flow field of the pump,when the airfoil is connected in series by a negative angle,it can improve the pressure distribution on the back of the blade,improve the cavitation performance of the pump and the axial velocity distribution along the axis direction of the axial-flow pump,and reduce the radial flow in the pump.When the airfoils are connected in series at a positive angle,the axial-flow at the outlet of the axial-flow pump can be more uniform.The research results can provide a certain reference for the design of the axial-flow pump.

关 键 词：轴流泵 翼型积叠方式 水力性能 内部流场 数值模拟 试验 

分 类 号：S277.9[农业科学—农业水土工程] TH311[农业科学—农业工程]