1725 ヨー状態における風車翼空気力学特性の研究(S34-2 自然流体エネルギーの利用技術(2),S34 自然流体エネルギーの利用技術)

概要

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In the actual wind turbine operated in the field, the wind direction changes with time. So, the turbine is operated with yaw miss alignment in most of time. To grasp the flow around wind turbine is important for evaluating the rotor performance. This paper shows the results of the velocity field measurement around a horizontal axis wind turbine in case various yawed operation. The experiments are carried out in a wind tunnel with 2.4m-diameter test rotor with 2-dimensional laser Doppler velocimeter. In the measurements the power curve and velocity distribution are measured for each yaw angle. Increasing of yaw angle, the power coefficient of the rotor decreases. The flow around turbine under yawed condition expands as non-yaw operation, but the flow pattern is not asymmetry with rotational axis. There is a large low-speed wake area in downstream of the blade placed upward. And flow around the blade placed downward has a large radial velocity component.
一般社団法人日本機械学会の論文
2007-09-07