Fluid Dynamics of Cavitation and Cavitating Turbopumps

The book focuses on the fluid dynamics of cavitation with special reference to high power density turbopumps, where it represents the major source of performance and life degradation and often generates the conditions for the onset of dangerous fluid dynamic instabilities. To this purpose the first part of the book covers the more fundamental aspects of cavitation (nucleation, bubble dynamics, thermodynamic effects, cavitation erosion, stability of parallel bubbly flows) and the main kinds of cavitating flows (attached cavitation, cloud cavitation, supercavitation, ventilated supercavities, vortex cavitation, shear cavitation). The second part focuses on the hydrodynamics and instabilities of cavitating turbopumps (cavitation surge, rotating cavitation, higher order cavitation surge, rotordynamic whirl forces). Finally, the third part illustrates the alternative approaches for modeling and engineering simulation of cavitating flows.

Contenu
The Rayleigh-Plesset equation: a simple and powerful tool to understand various aspects of cavitation.- Hydrodynamics and Cavitation of Pumps.- Cavitation Instabilities in Turbopump Inducers.- Stability Analysis of Cavitating Flows Through Inducers.- Suppression of Cavitation Instabilities.- Tip Leakage and Backflow Vortex Cavitation.- The Different Role of Cavitation on Rotordynamic Whirl Forces in Axial Inducers and Centrifugal Impellers.- A hyperbolic non equilibrium model for cavitating flows.- Towards the simulation of cavitating flows in inducers through a homogeneous barotropic flow model.