Definition and Validation of Cavitating Rocket Turbopump Transmission Matrices for Modular Multi Actuator Disk Approach

In this paper, the modular multi actuator disk approach, successfully developed for the study of the dynamic behavior of compressors and recently proposed also for the assessment of the dynamics of cavitating turbopumps, has been used as the mathematical framework for implementing a well-established model of a cavitating inducer developed in the 90s for the assessment of azimuthal instabilities with special focus on rotating cavitation. The dynamic model of the cavitating inducer implemented in the new mathematical framework has been validated by comparing its results with the available data in open literature for a tapered inducer. The new mathematical framework proved to be highly exible and it represents a big step forward toward the actual study of complex hydrodynamic systems that are not limited to the simplied conguration studied by the actuator disk model proposed in the 90s.