Multi-point airfoil optimization for axial-flow fan  

作　　者：DUAN Haojie LIU Lei DAI Ren 

机构地区：[1]School of Energy and Power Engineering,University of Shanghai for Science and Technology

出　　处：《排灌机械工程学报》2019年第6期469-474,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：Strategic Leading Project of Shanghai Municipal Science Committee(16DZ1121202)

摘　　要：Airfoil is the element of fan blade design. It is strongly anticipated to design a fan of ave- raged high performance over a wide operation range. Multi-point optimization design of airfoil for axial flow fan was proposed over specific operation range. Weighted objective function of airfoil lift-drag ratio was constructed for several operation points around the designing one. Airfoil was defined by parametric B-spline curve of limited shape controlling points. Results show that normal standard airfoils have remained spaces to be optimized under specific operation conditions. Airfoil performance is sensitive to flow′s Reynolds number and cascade solidity. Predicting flow transition along airfoil profile is essential to search for optimized one. Optimized airfoil of wide operation range is possible to obtain with prescribed fitness function. Obtainments of multi-point optimization may be relatively lower at design point, but positive obtainments are achieved at off-design ones. Resulted airfoil is specially suitable for axial flow fans operating frequently at off-design point such as air condition coolers.Airfoil is the element of fan blade design.It is strongly anticipated to design a fan of averaged high performance over a wide operation range.Multi-point optimization design of airfoil for axial flow fan was proposed over specific operation range.Weighted objective function of airfoil lift-drag ratio was constructed for several operation points around the designing one.Airfoil was defined by parametric B-spline curve of limited shape controlling points.Results show that normal standard airfoils have remained spaces to be optimized under specific operation conditions.Airfoil performance is sensitive to flow’s Reynolds number and cascade solidity.Predicting flow transition along airfoil profile is essential to search for optimized one.Optimized airfoil of wide operation range is possible to obtain with prescribed fitness function.Obtainments of multi-point optimization may be relatively lower at design point,but positive obtainments are achieved at off-design ones.Resulted airfoil is specially suitable for axial flow fans operating frequently at off-design point such as air condition coolers.

关 键 词：multi-point optimization GEOMETRY DESCRIPTION lift-drag RATIO operation range AXIAL-FLOW FAN 

分 类 号：S277[农业科学—农业水土工程]