Effects of Perforation Number of Blade on Aerodynamic Performance of Dual-rotor Small Axial Flow Fans  

作　　者：HU Yongjun WANG Yanping LI Guoqi JIN Yingzi Toshiaki Setoguchi Heuy Dong Kim 

机构地区：[1]The Zhejiang Provincial Key Laboratory of Fluid Transmission Technology,Zhejiang Sci-Tech University [2]Department of Mechanical Engineering,Saga University,Honjo-machi,Saga,840-8502,Japan [3]School of Mechanical Engineering,Andong National University,Seongcheon-Dong1375,Gyeongdong-RD,Andong,Gyeongsangnuk-DO,760-749,Korea

出　　处：《Journal of Thermal Science》2015年第2期123-130,共8页热科学学报（英文版）

基　　金：supported by National Natural Science Foundation of China(No.51276172)

摘　　要：Compared with single rotor small axial flow fans, dual-rotor small axial flow fans is better regarding the static characteristics. But the aerodynamic noise of dual-rotor small axial flow fans is worse than that of single rotor small axial flow fans. In order to improve aerodynamic noise of dual-rotor small axial flow fans, the pre-stage blades with different perforation numbers are designed in this research. The RANS equations and the standard k-e turbulence model as well as the FW-H noise model are used to simulate the flow field within the fan. Then, the aerodynamic performance of the fans with different perforation number is compared and analyzed. The results show that： （1） Compared to the prototype fan, the noise of fans with perforation blades is reduced. Additionally, the noise of the fans decreases with the increase of the number of perforations. （2） The vorticity value in the trailing edge of the pre-stage blades of perforated fans is reduced. It is found that the vorticity value in the trailing edge of the pre-stage blades decreases with the increase of the number of perforations. （3） Compared to the prototype fan, the total pressure rising and efficiency of the fans with perforation blades drop slightly.

关 键 词：dual-rotor small axial flow fans the blade with perforation perforation number aerodynamic per-formance 

分 类 号：TH432.1[机械工程—机械制造及自动化]