INTERNAL FLOW MECHANISM AND EXPERIMENTAL RESEARCH OF LOW PRESSURE AXIAL FAN WITH FORWARD-SKEWED BLADES  

作　　者：LI Yang LIU Jie OUYANG Hua DU Zhao-Hui 

机构地区：[1]College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061,China [2]School of Environmental and Municipal Engineering, Qingdao Technological University, Qingdao 266033, China [3]School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China

出　　处：《Journal of Hydrodynamics》2008年第3期299-305,共7页水动力学研究与进展B辑（英文版）

基　　金：the National Natural Science Foundation of China (Grant No.50406017)

摘　　要：This article presents the flow mechanism analysis and experimental study of a forward-skewed impeller and a radial impeller in low pressure axial fan. The forward-skewed blade was obtained by the optimization design of the radial blade and CFD technique. Measurement of the two blades was carried out in aerodynamic and aeroacoustic performance. Compared to the radial blade, the forward-skewed blade has demonstrated the improvements in efficiency, total pressure ratio, Stable Operating Range （SOR） and less aerodynamic noise. Detailed flow measurement and computation were performed for outlet flow field for investigating the responsible flow mechanisms. The results show the forward-skewed blade can cause a spanwise redistribution of flow toward the blade mid-span and reduce tip loading. This results in reduced significantly total pressure loss near hub and shroud endwall region, despite the slight increase of total pressure loss at mid-span.This article presents the flow mechanism analysis and experimental study of a forward-skewed impeller and a radial impeller in low pressure axial fan. The forward-skewed blade was obtained by the optimization design of the radial blade and CFD technique. Measurement of the two blades was carried out in aerodynamic and aeroacoustic performance. Compared to the radial blade, the forward-skewed blade has demonstrated the improvements in efficiency, total pressure ratio, Stable Operating Range （SOR） and less aerodynamic noise. Detailed flow measurement and computation were performed for outlet flow field for investigating the responsible flow mechanisms. The results show the forward-skewed blade can cause a spanwise redistribution of flow toward the blade mid-span and reduce tip loading. This results in reduced significantly total pressure loss near hub and shroud endwall region, despite the slight increase of total pressure loss at mid-span.

关 键 词：low pressure axial fan forward-skewed blade aerodynamic performance flow mechanism 

分 类 号：TH445[机械工程—机械制造及自动化]