多重調和操舵を受ける前進飛行時のロータハブ変動荷重の空力弾性応答特性 (第2報)

実験的研究

抄録

To substantiate the validity and usefulness of the mathematical model proposed in Part 1 of this paper, dynamic wind tunnel tests to measure hub vertical load response of a rotor in forward flight are conducted using one bladed model rotor. Following brief descriptions concerning design features of the testing apparatus, comparisons between numerical and experimental results are made. Physical requirements and resolution accuracy imposed on multiple sinusoidal blade pitch control for reducing hub vertical loads are clarified. Numerical results showed quite well agreement with experimental ones at low speed range, however, further improvements of wake modeling are anticipated for the speed ranges where such dynamic effects as the blade-tip vortex interaction are dominated.