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GENERICVORTEX MODELLING FOR HORIZONTAL-AXIS WIND TURBINES

机译:水平轴风轮机的GENERICVORTEX建模

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摘要

This paper describes a generic free-wake calculation of wind turbine wakes. The expanding, helical, tip vortices are represented by a sequence of straight segments, the blades are modelled as lines of constant bound vorticity, and the hub vortices lie along the axis of rotation. It is shown that this model is consistent with the one-dimensional analysis that leads to the Lanchester-Betz limit, in that the velocity in the far-wake is uniform with radius. Particular attention is paid to turbines operating above the Lanchester-Betz limit. It is shown that the usual relationship between the velocity through the blades and in the far-wake breaks down when there is significant wake expansion, and an empirical modification to that relation is presented. For highly expanding wakes, the dynamics of the turbine depend sensitively on the behaviour of the tip vortices.
机译:本文介绍了风力涡轮机尾流的通用自由尾流计算。扩展的螺旋形尖端涡旋由一系列直段表示,叶片建模为恒定束缚涡旋线,轮毂涡旋沿旋转轴放置。结果表明,该模型与导致Lanchester-Betz极限的一维分析是一致的,因为远尾的速度与半径是一致的。特别注意在Lanchester-Betz极限以上运行的涡轮机。结果表明,当有明显的尾流膨胀时,通过叶片的速度与远尾的速度之间的通常关系会破裂,并给出对该关系的经验修正。对于高度扩展的尾流,涡轮机的动力学敏感地取决于尖端涡旋的行为。

著录项

  • 来源
    《Wind Engineering》 |2002年第2期|p.71-84|共14页
  • 作者

    D. H. Wood;

  • 作者单位

    School of Engineering, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 风能、风力机械;
  • 关键词

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