キャビテーション激振時における翼形の非定常揚抗力特性

抄録

To make clear the behavior of cavitation-violent-vibrations, we precisely investigated the lift-and the drag-fluctuations, the vibrational accelerations, and the corresponding cavitation aspects in the steady water flow around a Low drag Eppler-foil. The lift and the drag fluctuate considerably in the state of the periodic "cavity separation" of about 21 Hz in frequency, and these amplitudes reach ±24 percents of the time averaged values. A strong correlation is observed be tween the time-dependent cavity behavior and the corresponding fluctuations, i.e., the lifts, the drags and the vibrations.