1213 コーニング角付き小型水平軸風車の空力特性に及ぼすレイノルズ数の影響(OS12-3 再生可能流体エネルギー,オーガナイズドセッション)

抄録

For the improvement of rotor performance of the micro horizontal axis wind turbines (HAWT), the coning angle has been introduced to the turbine rotor blade in the downstream direction. It can move the shedding position of the tip vortices away from the principal parts of blade, which decreases the axial induced velocity, leading to the increase of incoming velocity to the rotor. A series of experiments conducted by using model rotors installed on the top of the building shows that the power coefficient of the micro-HAWT with coning angle is smaller than that of the original-HAWT without coning angle, especially in low Reynolds number conditions. The effects of coning angle and Reynolds number are discussed in the present paper, focusing on the flow around the rotor blades.