Experimental studies on velocity field around wind turbine rotor

2011 International Conference & Utility Exhibition on Power and Energy Systems: Issues and Prospects for Asia (ICUE) Pub Date : 2011-09-01 DOI:10.1109/ICUEPES.2011.6497744

Y. Kamada, T. Maeda

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引用次数: 2

Abstract

This paper describes the behavior of the flow field around rotor blades. A three-bladed upwind rotor was tested in a single return type wind tunnel. The rotor had a diameter of 2.4 m. The flow field around the rotor blades was measured using two-dimensional LDV. The three velocity components of flow field were measured in the x-y plane. The velocity vectors at optimum operation showed a smooth flow around the blade and the bound vortex around blade cross-section seemed persistent. On the other hand, the velocity vectors in stall condition demonstrated significant fluctuations in the near wake and separation on the blade suction side was observed. The circulation around a blade span-wise section was calculated at a certain control volume. From observations of the flow field and the calculated results of circulation, it seems that the flow is separated at the blade from the middle-span region to the tip region in stall condition. No separation was observed at the blade's root region.

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风力发电机转子周围速度场的实验研究

本文描述了旋翼叶片周围流场的特性。在单回式风洞中对三叶片逆风转子进行了试验。转子直径为2.4 m。利用二维LDV测量了旋翼叶片周围的流场。在x-y平面上测量了流场的三个速度分量。最佳工况下的速度矢量表现为叶片周围的平滑流动，且叶片横截面周围的束缚涡持续存在。另一方面，失速状态下的速度矢量在近尾迹处表现出明显的波动，并且在叶片吸力侧观察到分离现象。在一定的控制体积下，计算叶片跨截面周围的循环。从流场观察和循环计算结果来看，在失速状态下，流动在叶片处从跨中区向叶尖区分离。在叶片根部未观察到分离。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 International Conference & Utility Exhibition on Power and Energy Systems: Issues and Prospects for Asia (ICUE)

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