One source of unsteadiness in turbopumps inducers cosists in a rotating vavitation behavior, chanracterized by different cavity shapes on the different blades and leading to super of sub synchronous disturbances. We intend in this paper to simulate this phenomenon in the case of a simple 2D blade cascade corresponding to an inducer with a constant hub to tip ratio and a constant thread. A numerical model of unsteady cavitating flows was adapted to take into account non-matching comections and periodicity conditions, and a multi-domain procedure was set in place. Some promising results are presented in this paper: dependeing on the value of the cavitation number imposed in the computation, we obtain as well some stable behaviours as some unstable ones, with different cavity sizes on each blade.
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