摘要
为分析Gurney襟翼对风力机翼型气动性能和气动噪声特性的影响,利用Fluent软件中的LES模型计算攻角为4°~20°时原始翼型和带有不同高度Gurney襟翼翼型的气动性能和流场分布,并基于FW-H声类比方法,利用Acoustics模块精确求解远场气动噪声。结果表明:升力系数大于0.8时,Gurney襟翼能明显增大翼型升力系数,但阻力系数也显著增大;襟翼高度小于3%弦长时,失速攻角明显增大;襟翼高度大于3%弦长时,升力系数增幅减小,阻力系数增幅增大,且气动噪声急剧增加,翼型声辐射特征呈现偶极子声场的特点。
To analyze the influence of Gurney flaps on the aerodynamic performance and noise characteristics of wind turbine airfoils,the LES model in Fluent software was used to study the aerodynamic performance and flow field distribution of an original airfoil and the airfoil with Gurney flaps of different heights at the angle of attack in 4°-20°,while their far-field aerodynamic noise was calculated using Acoustics modules based on FW-H sound analogy method.Results show that when the lift coefficient of airfoil is greater than 0.8,the Gurney flap could effectively increase the lift coefficient,but would also raise its drag coefficient significantly.When the flap height is less than 3%of the chord length,the stalling angle of attack would be effectively increased;when the flap height exceeds 3%of the chord length,the increase degree of lift coefficient drops,while that of drag coefficient rises,and the aerodynamic noise increases sharply thereafter.The airfoil sound radiation shows the characteristics of dipole sound field.
作者
叶舟
周伟
徐学昊
宋建业
YE Zhou;ZHOU Wei;XU Xuehao;SONG Jianye(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2019年第8期654-660,共7页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(51676131,51176129)
上海市科委资助项目(13DZ2260900)
