摘要
在最优和小流量工况下，利用二维激光多普勒测速计分别测量了大出口角离心泵叶轮输送粘油时的内部流动，分析了内部流动特征。试验表明，在叶片吸力面存在已经分离的尾流，压力面不存在射流，叶轮内部流动为分离流动，不符合射流／尾流模型；由最优变到小流量工况，尾流宽度增加。为了提高叶轮输送粘油时的水力性能，应该削弱或消除分离的尾流。
Flows of viscous oil in a centrifugal pump impeller with large discharge and small wrapping - of blade are meased by using a two-dimensional laser Doppler velocimeter at the best efficiency and Part-loading points, respectively, and the features of the flow are analyzed. The tested results show that a wake Sepaxated is found near the suction side and a jet does not exist near blade pressure side, so that the Wellknown jet/wake flow model is not found in the impeller tested. The range that the wake covers is eularged while the Purmp working condition is changed form the best efficiency to the part-loading points. The wake Separated should be weakned or eliminated to improve the hychaulic performance While the impeer handling viscous oils.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2000年第6期33-36,共4页
Journal of Mechanical Engineering
基金
国家教委博士点基金!19990614
关键词
离心泵
粘油
叶轮
流动测量
Centrifugal Pump Viscous oil Impeller Flow
