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A study on performance influences of airfoil aerodynamic parameters and evaluation indicators for the roughness sensitivity on wind turbine blade

引用

Science China(Technological Sciences) 2011年第11期54卷 2993-2998页

作者： HUANG ChenWu YANG Ke LIU Qiang ZHANG Lei BAI JingYan XU JianZhong Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

The roughness increase on horizontal axis wind turbine(HAWT) blade surface,especially on the leading edge,can lead to an aerodynamic performance degradation of blade and power output loss of HAWT,so roughness sensitivity is an important factor for the HAWT blade ***,there is no criterion for evaluating roughness sensitivity of blade *** this paper,the performance influences of airfoil aerodynamic parameters were analyzed by the blade element momentum(BEM) method and 1.5 MW wind turbine *** showed that airfoil lift coefficient was the key parameter to the power output and axial thrust of ***,the evaluation indicators of roughness sensitivity for the different spanwise airfoils of the pitch-regulated HAWT blade were *** respectively were the lift-to-drag ratio and lift coefficient without feedback system,the maximum lift-to-drag ratio and design lift coefficient with feedback system for the airfoils at outboard section of blade,and lift coefficient without feedback,maximum lift coefficient with feedback for the airfoils at other sections under the pitch-fixed and variable-speed *** is not necessary to consider the roughness when HWAT can be regulated to the rated power output by the pitch-regulated and invariable-speed operation.

关键词： HAWT blade airfoil aerodynamic performance roughness sensitivity evaluation indicator

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Functional design of wind turbine airfoils based on roughness sensitivity characteristics

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High Technology Letters 2014年第4期20卷 442-445页

作者：王旭东 Xia Hongjun Chongqing Key Laboratory of Manufacturing Equipment Mechanism Design and Control ChongQing Technology and Business University State Key Laboratory of Mechanical Transmission ChongQing University

To improve aerodynamic performance of wind turbine airfoils,the shape profile characteristic of the airfoil is *** of conformal transformation,one functional and integrated expression of wind turbine airfoils is *** the boundary layer theory,the aerodynamic model with roughness of wind turbine airfoils is introduced by studying flow separation around the *** on the shape expression and aerodynamic performance of airfoils,the function design of wind turbine airfoils is carried out that the maximum lift-drag ratio and low roughness sensitivity are designed *** wind turbines airfoils with different thickness are gained which are used at tip part of *** an example,the aerodynamic performance of one designed airfoil with relative thickness of 15%is simulated in different conditions of clean surface,rough surface,laminar flow and turbulent *** comparison of aerodynamic performance between the designed airfoil and one popular NACA airfoil is completed which can verify the better performance of the designed airfoil and reliability of the designed method.

关键词： wind turbine airfoils integrated expression lift-drag ratio roughness sensitivity function design

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