周期流における振動翼の位相差と周波数比が推力係数と揚力係数に与える影響

抄録

We investigated the phase difference and frequency ratio effect on the thrust and lift coefficient of oscillating foil in a periodic flow. The periodic flow is the freestream oscillating in the streamwise direction. The frequency ratio is the ratio of foil frequency to freestream one. The thrust and lift coefficients were obtained using OpenFOAM v8 under the conditions of Reynolds number of 4066 and frequency ratio of 1, 2, and 3. We found that the thrust increases with increasing frequency ratio. Furthermore, the effect of phase difference on lift coefficient is relatively small at the frequency ratio of 2 and 3 under the present condition. We also found the correlation between forces and wake velocity.