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

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...

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Bibliographic Details
Published in:Journal of Hydrodynamics 2008-06, Vol.20 (3), p.299-305
Main Authors: Li, Yang, Liu, Jie, Ouyang, Hua, Du, Zhao-Hui
Format: Article
Language:English
Subjects:
Engineering
Engineering Fluid Dynamics
Hydrology/Water Resources
Numerical and Computational Physics
Simulation
低压轴向风机
前倾叶片
流动机制
空气动力学
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Summary: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.
ISSN:1001-6058
1878-0342
1000-4874
DOI:10.1016/S1001-6058(08)60061-X