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Journal of Hydrodynamics

, Volume 20, Issue 3, pp 299–305 | Cite as

Internal flow Mechanism and Experimental Research of low Pressure Axial fan with Forward-Skewed Blades

  • Yang LiEmail author
  • Jie Liu
  • Hua Ouyang
  • Zhao-Hui Du
Article

Abstract

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.

Key words

low pressure axial fan forward-skewed blade aerodynamic performance flow mechanism 

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Copyright information

© China Ship Scientific Research Center 2008

Authors and Affiliations

  1. 1.College of Electromechanical EngineeringQingdao University of Science and TechnologyQingdaoChina
  2. 2.School of Environmental and Municipal EngineeringQingdao Technological UniversityQingdaoChina
  3. 3.School of Mechanical EngineeringShanghai Jiaotong UniversityShanghaiChina

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