旋回キャビテーション発生下でインデューサに作用する非定常翼間圧力分布と非定常流体力

抄録

Unsteady interblade pressure distributions under rotating cavitation and cavitation surge of an inducer were measured using an "AND" circuit which combines the trigger pulses indicating the blade location and the phase of unsteady inlet pressure. This measurement enabled observation of the propagation process of rotating cavitation. In addition, unsteady blade and shaft loading under rotating cavitation can be evaluated and compared with those caused by surge mode oscillations. Although rotating cavitation has smaller inlet pressure fluctuation, it was found to have larger blade load fluctuation than the surge mode oscillation, with its amplitude comparable to a steady load.