回流器出口角对离心风机叶轮性能的影响研究  

Study on the Effect of Return Vane Outlet Angle on Performance of Centrifugal Fan Impeller

作　　者：杨柳[1] 陈扬枝[1] Liu Yang;Yang-zhi Chen(South China University of Technolog)

机构地区：[1]华南理工大学,广东广州510641

出　　处：《风机技术》2018年第4期24-30,共7页Chinese Journal of Turbomachinery

摘　　要：基于离心风机叶轮的设计理论,根据叶轮叶片进口角、叶片进口气流角与回流器叶片出口角三者之间的关系,对比分析了不同参数的回流器叶片出口角对叶轮结构设计及叶轮性能的影响。结果发现,在相同工况下,当回流器叶片出口角为90°时,叶轮叶片最佳进口角最大,叶轮全压与功率也最大,当回流器叶片出口角小于90°时,叶轮全压及功率下降,但叶轮叶片最佳进口角增大。对于初始气流角过小的叶轮,回流器叶片出口角的减小,有助于使叶轮流道分布更加合理,从而获得更好的流场。本文对多级离心通风机的系列化设计具有参考价值。Based on the relationship among inlet angle of impeller blade, inlet flow angle of impeller blade, and the outlet angle of return vane, the influences of different outlet angle of return vane on the performance and the impeller struetme of centrifugal fan were analyzed.The resuhs shows that in the same working conditions, the optimal inlet angle of impeller blade, the pressme and the power are the largest when the outlet angle of return vane is equals to 90°. The pressme and the pouter decreases when the outlet angle of return vane decreases, but the optimal inlet angle of impeller blade increases. When the original flow- angle of the impeller is too small, the outlet angle return vane decreasing, could facilitate to generate a more reasonable distribution of impeller passage for a better flow field.

关 键 词：离心风机 回流器 叶片出口角 叶轮 叶片进口角 

分 类 号：TH432[机械工程—机械制造及自动化] TK05[动力工程及工程热物理]