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首页> 外文期刊>Journal of Flow Visualization and Image Processing >VISUALIZATION OF ROTOR TIP VORTICES GENERATED BY A FULL-SCALE MOD-2 WIND TURBINE
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VISUALIZATION OF ROTOR TIP VORTICES GENERATED BY A FULL-SCALE MOD-2 WIND TURBINE

机译：大型MOD-2型风力发电机产生的转子尖端涡动可视化。

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摘要

Novel flow visualization methods using smoke tracers and flow streamers were developed for investigating rotor tip vortices generated by a 2.5-MW MOD-2 wind turbine through full-scale field experiments. Smoke tracers were released from smoke generators tethered to the turbine tower and placed just downwind of the rotor or launched from model rockets. Flow streamers made of long and thin crepe papers and/or fabric strips were tethered to a parafoil kite. Each method reveals different perspectives of the tip vortices. Several vortex phenomena have been discovered from the new field results. These phenomena were not revealed in small-scale laboratory experiments because of failure to achieve dynamic similarity. Of particular interest are the physical separation of the helical vortex trajectories and the wind turbine wake and reversal of the tip vortex. A core-within-a-core is one of the dramatic scenes displayed by smoke tracers as the tip vortex retracts through its original course during vortex reversal.
机译：开发了使用烟雾示踪剂和流动拖缆的新型流动可视化方法，以通过全面的现场实验研究2.5兆瓦MOD-2风力发电机产生的转子尖端涡流。烟雾示踪剂从系留在涡轮机塔架上的烟雾发生器释放，并放置在转子的顺风方向或从模型火箭发射。用长而薄的皱纹纸和/或织物条制成的流光缆束缚在翼型风筝上。每种方法揭示了尖端涡的不同观点。从新的现场结果中发现了几种涡旋现象。由于未能实现动态相似性，因此在小型实验室实验中未发现这些现象。特别令人感兴趣的是螺旋形涡旋轨迹的物理分离以及风力涡轮机的尾涡和尾涡的逆转。核心内的核心是烟气示踪剂显示的戏剧性场景之一，因为在涡旋反转期间尖端涡旋缩回其原始路线。

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