前倾角对离心压气机叶轮性能的影响  

Influence of front lean angle on centrifugal compressor performance

作　　者：彭森[1] 杨策[1] 马朝臣[1] 王航 

机构地区：[1]北京理工大学机械与车辆工程学院,北京100081 [2]湖南江雁机械厂

出　　处：《清华大学学报（自然科学版）》2005年第2期250-253,共4页Journal of Tsinghua University(Science and Technology)

摘　　要：为研究前倾角对离心压气机性能的影响,使用离心压气机计算机辅助集成设计系统设计了一个普通后弯叶轮,并通过改变叶轮出口角得到了带有30°和45°两个不同前倾角的离心压气机叶轮。利用三维Navier-Stokes方程对这3个叶轮的特性曲线进行了计算。计算结果表明,在相同流量情况下,随前倾角的增大,叶轮压比下降。合适的前倾角有利于扩大压气机工作范围,能够改善流道内的流动,提高等熵效率。The effects of lean angle on compressor performance were investigated using a back swept impeller designed on a computer aided integral design system. Two impellers with 30° and 45° front lean angles were obtained by changing the impeller outlet angle. The flow in a centrifugal compressor with these impellers was then modelled by solving the three-dimension Navier-Stokes equations. The results show that the pressure ratio decreases as the front lean angle increases for the same mass flow. An appropriate front lean angle increases the range of a centrifugal compressor, improves the flow and enhances the isentropic efficiency.

关 键 词：离心压气机 NAVIER-STOKES方程 后弯叶轮 倾角 

分 类 号：TK474.8[动力工程及工程热物理—动力机械及工程]