S0503-2-5 ロータ回転数制御に伴う水平軸風車の空力動特性([S0503-2]自然の流体エネルギー利用技術(2))

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For the horizontal axis wind turbine (HAWT) rotors, the rotor speed and/or the blade pitch of the rotors are frequently changed during their operation to control their power outputs or to reduce fluctuating loads on the rotors and drive trains. In order to optimize these control methods for HAWT rotors, it is imperative to understand unsteady aerodynamic characteristics of the wind turbine rotors. The unsteadiness of the rotor wake flow due to the blade pitch and the rotor speed control brings about a transient response of the rotor performance with relatively long time constant, while dynamic stall phenomena due to unsteadiness of the boundary layer flow on the rotor blade cause quicker aerodynamic response than the wake induced unsteadiness. The present study examines the unsteady aerodynamic characteristics of the HAWT rotor induced by the rotor speed control, by conducting a model analysis based on acceleration potential method and an experiment using a small HAWT rotor installed in the open air.
一般社団法人日本機械学会の論文
2010-09-04