离心泵叶轮内二维PIV非定常流动测量  

2-D PIV Measurements of Unsteady Flow Field inside the Rotating Impeller of Centrifugal Pump

作　　者：杨华[1] 汤方平[1] 刘超[2] 周济人[2] 徐浩然[1] 

机构地区：[1]扬州大学能源与动力工程学院,扬州225127 [2]扬州大学水利科学与工程学院,扬州225009

出　　处：《农业机械学报》2011年第7期56-60,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50706041);江苏省自然科学基金资助项目(BK2007558);江苏省高校自然科学基金资助项目(07KJB570130)

摘　　要：采用二维PIV对离心泵蜗舌附近旋转叶轮内的流场进行了测量,获得了5个不同相位的二维相对速度场。结果显示:在流量Q/Qbep=0.52时,叶轮内压力面存在逆时针方向的回流,叶片在靠近蜗舌时,吸力面存在顺时针方向的回流。在流量Q/Qbep=1.0时,叶轮出口存在射流/尾迹现象。研究表明:小流量工况下,蜗舌对叶轮内的相对速度场有显著影响,而在最优工况下影响较弱。The flow fields in a rotating impeller,near the volute tongue of a centrifugal pump,were measured by the 2-D PIV technique.At the flow rate of Q/Qbep=0.52,a counter clockwise recirculation flow existed on the blade pressure-side,when the blade was close to the volute tongue,a clockwise recirculation flow occurred on the blade suction-side.At the flow rate of Q/Qbep=1.0,a jet/wake flow existed at the exit of the impeller.The results show that the effects of the volute tongue on the relative velocity distribution are more significant at the low flow rate condition than at the best efficiency point.

关 键 词：离心泵 叶轮 PIV测量 非定常 

分 类 号：TH311[机械工程—机械制造及自动化]