摘要
为在有限土地资源内提高风电场发电效率,减少上风机对下风机尾流效应影响,通过利用Windcube V2多普勒测风仪方法研究了两台风机错列布置状态下风机尾流场变化,比较无尾流状态和有尾流状态下风机的速度场和分析风机之间的尾流影响。结果表明:上风机尾流效应对下风机第二象限区影响最大,轴向速度出现先减小后增加再减小再增加过程;第一象限区出现先减小后增加过程。径向和切向速度幅值和频率出现先增加后减小,径向速度幅值和频率5倍风轮直径截面处最大,3倍风轮直径最小,切向速度幅值和频率5倍风轮直径截面处最大,8倍风轮直径最小。上风机对下风机尾流叠加形成复杂的湍流并促使尾流内外流场融合,造成不同的轴向速度值。因此,在实际工作中,应在了解当地的风场特征的基础上,充分考虑风机的排列阵式。
To improve power generation efficiency of wind turbine within a limited area and reduce the impact of wake field,the wake effect of any two neighboring windmills in staggered array was studied using the Windcube V2 Doppler wind gauge method,and the wind fields with and without the wake effect were compared.The results show that wake had a clear influence on the wind field in the second quadrant of the rear windmill.The axial velocity fluctuated from decrease,increase,decrease again,and increase again.In the first quadrant area however,it decreased first and then increased.The radial and tangential velocity amplitude and frequency increased first and then decreased.The radial velocity amplitude and frequency were the largest at 5 D section(D is the diameter of windmill),and smallest at 3 D.The tangential velocity amplitude and the frequency were the largest at 5 D,and smallest at 8 D.The front windmill may form a complex turbulence with a wake impact on the rear windmill performance,and the turbulence could result in the merging of wake field with external flow fields,causing different effects on the axial velocity values of rear windmills.Therefore,the wake effect shall be addressed in wind turbine arrangement design according to local wind field characteristics.
作者
张志阳
魏敏
胡蓉
张立新
李辉
ZHANG Zhi-yang;WEI Min;HU Rong;ZHANG Li-xin;LI Hui(School of Mechanical and Electrical Engineering,Shihezi University,Shihezi 832000,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China)
出处
《科学技术与工程》
北大核心
2020年第1期207-212,共6页
Science Technology and Engineering
基金
国家自然科学基金(51675354)
关键词
尾流效应
测风仪
速度幅值
尾流叠加
湍流现象
wake effect
wind gauge
velocity amplitude
wake superposition
turbulence phenomenon
作者简介
第一作者:张志阳(1993-),男,汉族,硕士研究生。E-mail:15062197907@163.com。通信作者:魏敏(1968-),女,汉族,硕士,教授。E-mail:1448237074@163.com。
