Influence of Tip End-plate on Noise of Small Axial Fan  

作　　者：MAO Hongya WANG Yanping LIN Peifeng JIN Yingzi Toshiaki Setoguchi Heuy Dong Kim 

机构地区：[1]Key Laboratory of Fluid Transmission Technology of Zhejiang Province,Zhejiang Sci-Tech University [2]Department of Mechanical Engineering,Saga University [3]School of Mechanical Engineering,Andong National University

出　　处：《Journal of Thermal Science》2017年第1期30-37,共8页热科学学报（英文版）

基　　金：supported by National Natural Science Foundation of China No.51276172;Zhejiang province No.2015C31002,ZSTUME01A04 and 2013TD18

摘　　要：In this work, tip end-plate is used to improve the noise performance of small axial fans. Both numerical simulations and experimental methods were adopted to study the fluid flow and noise level of axial fans. Four modified models and the prototype are simulated. Influences of tip end-plate on static characteristics, internal flow field and noise of small axial fans are analyzed. The results show that on basis of the prototype, the model with the tip end-plate of 2 mm width and changed length achieved best noise performance. The overall sound pressure level of the model with the tip end-plate of 2 mm width and changed length is 2.4 dB less than that of the prototype at the monitoring point in specified far field. It is found that the mechanism of noise reduction is due to the decrease of vorticity variation on the surface of blades caused by the tip end-plate. Compared with the prototype, the static pressure of the model with the tip end-plate of 2 mm width and changed length at design flow rate decreases by 2 Pa and the efficiency decreases by 0.8%. It is concluded that the method of adding tip end-plate to impeller blades has a positive influence on reducing noise, but it may diminish the static characteristics of small axial fan to some extent. © 2017, Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag Berlin Heidelberg.

关 键 词：Axial flow FANS Flow of fluids Noise abatement Numerical methods 

分 类 号：TH432.1[机械工程—机械制造及自动化] TB53[理学—物理]