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요약정보
凹坑对风力机翼型气动性能的影响 / Influence of Dimples on Aerodynamic Performance of Wind Turbine Airfoil
Resource Type
Academic Journal
Authors
王艳芬
;
陆华伟
;
郭爽
;
王龙
;
辛建池
;
Yan-fen Wang
;
Hua-wei Lu
;
Shuang Guo
;
Long Wang
;
Jian-chi Xin
Source
风机技术 / Compressor, Blower & Fan Technology
. 63(5):8-15
Subject
风力机;凹坑;流动分离;数值模拟
Language
Chinese
ISSN
1006-8155
Online Access
Find it @ DONGA
초록
叶片是风力机的主要部件,叶片上的损失也是风力机主要损失来源之一,因此减少叶片损失,提高风力机性能一直是人们研究的课题.文中借助fluent软件对NACA 4412叶片进行数值模拟,计算采用SST k-ω湍流模型,分析了Re=6.8×105时翼型上的流场分布,并将得到的升力系数和阻力系数与实验数据进行了比较,证明了文中算法的可靠性.文中通过对改变凹坑半径大小、位置等方式进行研究,观察其对风力机气动性能的影响.研究结果表明,将凹坑布置在叶片尾缘附近分离涡相对于原型更小,随着凹坑半径的增加,减小流动分离的效果先增加后减小,在半径为10mm时控制效果最好.攻角大于25°时,将半径为10mm的凹坑布置在60%~82%弦长处,可使升力系数增加6.9%.
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