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S型叶尖小翼对风力机流场动力学特性的影响研究

发表时间:2011-09-30  浏览量:1252  下载量:573
全部作者: 张立茹,汪建文,于海鹏,由志刚,高志鹰
作者单位: 内蒙古工业大学能源与动力工程学院
摘 要: 结合滑移网格的大涡模拟方法,在不同方位面给定尖速比,对S型叶尖小翼的三叶片水平轴风力机流场动力学特性进行数值研究,结果表明:加装S型小翼后,在风轮前方形成了更大的速度亏损,改善了风轮前方的速度及压力分布情况,汲取了更多的风能;风轮压力面及吸力面的压差由1 359 Pa提高到1 756 Pa,使风轮功率放大;同时提高了叶尖线速度,降低了叶尖涡轴向速度。且在每个叶尖涡核中心的上方和下方都存在轴向速度增益和亏损的区域,与粒子图像测速(particle image velocimetry, PIV)实验结果一致。
关 键 词: 风能;水平轴风力机;S型小翼;非定常流场;大涡模拟;滑移网格
Title: Impact studies of S-type tip vane on dynamic characteristics of the flow field about the wind turbine
Author: ZHANG Liru, WANG Jianwen, YU Haipeng, YOU Zhigang, GAO Zhiying
Organization: College of Energy and Power Engineering, Inner Mongolia University of Technology
Abstract: Combined with large eddy simulation method of sliding mesh in different direction faces and given tip speed ratios, this paper did numerical study on the dynamic characteristics of the flow field about the three-blade horizontal axis wind turbine with a S-type tip vane. Results showed that: after installing the S-type tip vane, greater loss of rate was formed in the front of the wind turbine. The speed and pressure distribution were improved in the front of the wind turbine and more wind energy was absorbed. The pressure deviation of the wind turbine between pressure surface and suction surface increased from 1 359 Pa to 1 756 Pa, it made the power of the wind turbine amplify. Meanwhile, tip speed was increased, the tip vortex axial velocity was reduced. The axial velocity gain and loss regions existed above and below the center of each tip vortex core, it was consistent to the experimental results of the particle image velocimetry (PIV).
Key words: wind energy; horizontal axis wind turbine; S-type tip vane; unsteady flow field; large eddy simulation; sliding mesh
发表期数: 2011年9月第18期
引用格式: 张立茹,汪建文,于海鹏,等. S型叶尖小翼对风力机流场动力学特性的影响研究[J]. 中国科技论文在线精品论文,2011,4(18):1635-1640.
 
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