叶片角度对采用肘形流道的轴流泵装置特性的影响  

Influence of Different Blade Angles on Characteristics of Axial Flow Pump Device with Elbow Flow Passage

作　　者：程炀 孙众 张慧 刘冠霆 CHENG Yang;SUN Zhong;ZHANG Hui;LIU Guanting(Yangzhou Survey Design Research Institute Limited Company,Yangzhou 225000,China)

机构地区：[1]扬州市勘测设计研究院有限公司

出　　处：《流体机械》2019年第6期29-33,共5页Fluid Machinery

摘　　要：基于RNG k-ε湍流模型和雷诺时均N-S方程,运用CFD技术对采用肘形流道的某泵站轴流泵装置分别在叶片角度为-2°,0°和+2°时进行三维流动数值模拟,以探究不同叶片角度下肘形流道的流动特性,以及肘形流道与叶片角度对轴流泵装置性能的影响,并对肘形流道内进行了非定常计算。通过计算得到叶片角度对肘形流道内水流流动状态会产生影响,叶片角度的不同导致肘形流道内的流态也会不同,不同叶片角度下叶轮进口的流速均匀度也会产生差异。在不同叶片角度下,轴流泵装置的肘形进水流道内压力脉动同样会产生很大的差异,压力脉动的差异会对机组的振动产生影响,通过对比叶片角度对采用肘形流道的轴流泵装置特性的影响,可以为工程中轴流泵装置叶片角度的调节提供一定的参考。Based on the RNG k-εturbulence model and the Reynolds time-averaged NS equation,the CFD software was used to carry out three-dimensional flow numerical simulation on the axial flow pump device with the elbow flow passage at a pumping station at-2°,0°,and+2°respectively,in order to investigate the flow characteristics of the elbow flow passage at different blade angles,and the influence of elbow flow passage and blade angle on the performance of the pump device,and the unsteady calculation was carried out for the elbow flow passage.The blade angle obtained by calculation would have a great influence on the flow state of the flow in the elbow flow passage.Different blade angles would result in different flow patterns in the elbow flow passage,and the uniformity of flow velocity at the impeller inlet would be different at different blade angles.At different blade angles,the pressure pulsation in the elbow inlet flow passage of the axial flow pump device would also produce a big difference.The difference in pressure pulsation would affect the vibration of the unit.By comparing the influence of the blade angle on the characteristics of the axial flow pump device with elbow flow passage,it can provide a certain reference for the adjustment of blade angle of the axial flow pump device in the project.

关 键 词：轴流泵 肘形流道 叶片安放角 水泵性能 压力脉动 

分 类 号：TH3[机械工程—机械制造及自动化] TV131[水利工程—水力学及河流动力学]