Analysis of rotating cavitation in inducers for liquid rocket engine

Super-synchronous and sub-synchronous rotating cavitation are two types of rotating cavitation in liquid rocket engine inducer. To investigate the difference between these two phenomena, the solution analysis was conducted based on the Tsujimoto rotating cavitation model, and numerical simulation was carried out. The results show that, when both types of the rotating cavitation take place, the mass flow gain factor M changes periodicaly. For the super-synchronous, M is larger than 0. However, for the sub-synchronous rotating cavitation, range of variation M is more extensive. Hence, in the most cases, the sub-synchronous rotating cavitation was hardly observed.