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首页> 外文期刊>Journal of visualization >A particle image velocimetry study of dual-rotor counter-rotating wind turbine near wake
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A particle image velocimetry study of dual-rotor counter-rotating wind turbine near wake

机译：双转子反向风力涡轮机附近的粒子图像测速研究

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This experimental work studied the flow characteristics in the near wake region behind dual-rotor wind turbines using two-dimensional particle image velocimetry. Two auxiliary rotors of 50% and 80% scale of the main rotor were installed upwind and operated in counter-rotating condition, which are compared to the conventional single-rotor turbine. In all the three configurations, a constant Reynolds number 9.5 × 10~4 was applied, and all the rotors operated at a fixed tip speed ratio of 3.46. The mean and phase-averaged velocity fields were investigated together with the turbulence kinetic energy. It was found that the two auxiliary rotors do not result in a significantly different wake flow property. The configuration implementing the 50% auxiliary rotor sees a slightly better wake characteristics, in terms of weaker main rotor tip vortices and a counter-rotating swirling shear region at the mid-span behind the main rotor. The decay rates of the peak vorticity of the main rotor tip vortices and their circulation are found to follow an exponential manner.
机译：该实验工作研究了使用二维粒子图像VELOCIMETRY的双转子风力涡轮机近唤醒区域的流动特性。两个辅助转子为50％和80％的主转子的辅助转子安装在逆向上并以反向旋转条件操作，与传统的单转子涡轮机相比。在所有三种配置中，施加了恒定的雷诺数9.5×10〜4，并且所有转子以固定的尖端速比操作为3.46。与湍流动能一起研究平均值和相平均速度场。发现两个辅助转子不会导致显着不同的唤醒流量。实现50％辅助转子的配置看到稍微更好的唤醒特性，就较弱的主转子尖端涡流和主转子后部跨度的跨度处的反向旋转旋转剪切区域而言。发现主转子尖端涡流的峰值的衰减率及其循环以遵循指数的方式。

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