高比转速斜流叶轮根尖加功量分配的影响分析  

EFFECTS OF CIRCULATION SPANWISE DISTRIBUTION ON HIGH SPECIFIC SPEED MIXED-FLOW IMPELLERS

作　　者：高星[1] 刘宝杰[1] 

机构地区：[1]航空发动机气动热力重点实验室,北京航空航天大学能源与动力工程学院,北京100083

出　　处：《工程热物理学报》2008年第9期1475-1478,共4页Journal of Engineering Thermophysics

基　　金：航空支撑基金项目(No．04B51004)

摘　　要：以高负荷高比转速斜流叶轮为例,采用数值模拟的方法,在级环境下分析了斜流叶轮根尖加功量分配形式对于斜流叶轮总体性能、叶尖泄漏以及出口均匀性的影响,讨论了斜流叶轮根尖加功量分配影响的内在机制。结果表明,强根部设计有利于减少叶轮内部流动损失,改善叶轮出口流场的均匀性,有利于获得较高的效率;而强尖部设计则有利于获得稍高一些的失速压比。Two high specific speed mixed-flow compressors were analyzed numerically by 3D viscous code.The performances and flow mechanism of two impellers were analyzed.The results show that increasing hub design circulation could make impeller achieve better performance and lower tip leakage loss,and make flow field at outlet more uniform,but increasing tip design circulation could make impeller achieve higher ratio of total pressure in surge condition.

关 键 词：斜流叶轮 高比转速 加功量分配 叶尖泄漏 

分 类 号：TH452[机械工程—机械制造及自动化]