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自由涡尾迹方法中涡核尺寸对风力机气动计算的影响

许波峰 刘冰冰 冯俊恒 左潞

许波峰, 刘冰冰, 冯俊恒, 左潞. 自由涡尾迹方法中涡核尺寸对风力机气动计算的影响[J]. 力学学报, 2019, 51(5): 1530-1537. doi: 10.6052/0459-1879-18-440
引用本文: 许波峰, 刘冰冰, 冯俊恒, 左潞. 自由涡尾迹方法中涡核尺寸对风力机气动计算的影响[J]. 力学学报, 2019, 51(5): 1530-1537. doi: 10.6052/0459-1879-18-440
Xu Bofeng, Liu Bingbing, Feng Junheng, Zuo Lu. INFLUENCE OF VORTEX CORE SIZE ON AERODYNAMIC CALCULATION OF WIND TURBINE IN FREE VORTEX WAKE METHOD[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(5): 1530-1537. doi: 10.6052/0459-1879-18-440
Citation: Xu Bofeng, Liu Bingbing, Feng Junheng, Zuo Lu. INFLUENCE OF VORTEX CORE SIZE ON AERODYNAMIC CALCULATION OF WIND TURBINE IN FREE VORTEX WAKE METHOD[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(5): 1530-1537. doi: 10.6052/0459-1879-18-440

自由涡尾迹方法中涡核尺寸对风力机气动计算的影响

doi: 10.6052/0459-1879-18-440
基金项目: 1) 国家自然科学基金项目资助(51607058)
详细信息
    通讯作者:

    许波峰

  • 中图分类号: O355,TK89

INFLUENCE OF VORTEX CORE SIZE ON AERODYNAMIC CALCULATION OF WIND TURBINE IN FREE VORTEX WAKE METHOD

  • 摘要: 涡核模型中的涡核尺寸对自由涡尾迹(free vortex wake,FVW)方法准确预估风力机气动特性至关重要,涡核尺寸包括初始涡核半径和由于耗散效应涡核半径在尾迹中的增长.FVW方法中涡线控制方程离散采用三步三阶预估校正格式,涡核模型采用经典Lamb-Oseen模型,并考虑了涡耗散效应和拉伸效应.首先,通过气动载荷和叶尖涡涡量平均值的分析得到初始涡核半径的取值范围;然后,根据叶尖涡耗散特性的分析,确定体现涡黏性耗散效应涡核半径增长的经验常数的取值;最后,分析了涡核尺寸对叶尖涡结构的影响,进一步验证初始涡核半径和涡黏性耗散经验常数的取值对风力机气动计算的影响.结果表明:当初始涡核半径大于50%弦长时,FVW方法收敛稳定且能准确预估风轮气动载荷;综合风轮气动载荷和叶尖涡耗散特性,初始涡核半径取60%到70%弦长为宜,且对应的涡黏性耗散经验常数取值也不同;风轮气动载荷和叶尖涡结构的准确预估主要受初始涡核半径影响,经验常数对其影响不大,而经验常数主要影响风轮下游尾流场叶尖涡的耗散特性.

     

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出版历程
  • 收稿日期:  2019-12-20
  • 刊出日期:  2019-09-18

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