K-1103 Higher Order Rotating Cavitation in an Inducer

Abstract

In the present study, a higher order rotating cavitation predicted by the stability analysis was identified thorough the measurements of inlet pressure fluctuation and blade stress fluctuation. The propergation speed ratio of the higher order rotating cavitation is about 5, and the amplitude of the blade stress fluctuation caused by this rotating cavitation is the same as that by the conventional rotating cavitation. In addition, a higher order cavitation surge was observed at the transition point from the conventional to the higher order rotating cavitation.