Factors Affecting Small Axial Cooling Fan Performance  

作　　者：Lihong Wang,Yingzi Jin,Baoling Cui,Yuzhen Jin,Jin Lin,Yanping Wang and Chuanyu Wu College of Mechanical Engineering & Automation,Zhejiang Sci-Tech University,Xiasha Education Zone,Hangzhou 310018,China 

出　　处：《Journal of Thermal Science》2010年第2期126-131,共6页热科学学报（英文版）

基　　金：support of Zhejiang Provincial Natural Science Foundation (No.R107635);Zhejiang Provincial Key Science Foundation (2008 C11027);National Natural Science Foundation of China (No.50735004)

摘　　要：Many factors such as outer diameter, hub ratio, blade numbers, shape and stagger angle affect the performance of small cooling fans. A small cooling fan was simulated using CFD software for three blade stagger angles （30.5°, 37.5°, 44.5°）and obtained the internal flow field and the static characteristics. Research indicated that the stagger angle has an obvious effect on the static characteristics of a fan. For flow rates below 0.0104 mVs, total pressure is the greatest when the stagger angle is 37.5°; flow rates higher than 0.0104 m^3/s, the total pressure is greatest when the stagger angle is 44.5° For the same flow rates, the velocity at inlet of pressure surface increases with in- creasing stagger angle, but the change of velocity on the suction surface is very small. For one model, vortices and the speed of revolution surfaces decrease with tip clearance increasing. But for other three models, increasing the stagger angle, the vortex intensity and speed of revolution surfaces at same height tip clearance increases, simultaneously, the position of vortex offset from the top of the rotor blade to the suction surface.

关 键 词：Axial flow fan Stagger angle Revolution surface Vortex intensity 

分 类 号：TB65[一般工业技术—制冷工程]