To address the adverse effects of unsteady vortices and cavitation on propeller efficiency and navigational safety at high operating speeds, this study performed numerical simulations of cavitating flow around the marine propeller PC456 using an implicit large eddy simulation (LES) approach coupled with the boundary da...
: This study investigates the influence of the cavitation coefficient on the internal flow field and pressure fluctuation characteristics of a pump-turbine using numerical simulations validated against experimental measurements. The validated model is then used to analyze hydraulic performance and cavitation-induced fl...
Cavitation in swirling flows is a major source of unsteadiness, pressure fluctuations, and material damage in hydraulic and marine systems, where strong vortical motion generates pronounced pressure deficits within the vortex core, making cavitation inception governed primarily by local vortex dynamics rather than glob...
Prescribed tangential micro-jet injection can modify cloud-cavitation dynamics, but the chordwise location that improves mean hydrodynamic performance may differ from the location that minimizes unsteady loading. This study compares five injection locations (x/c = 0.15, 0.30, 0.45, 0.60, and 0.70) on a Clark-Y hydrofoi...
Unsteady cavitation affects the hydraulic performance and reliability of mechanical engineering components such as hydrofoils, pumps, and turbines. Its numerical prediction remains challenging because standard one-fluid RANS simulations may overpredict eddy viscosity in the vapor–liquid transition region and suppress...
Cavitation state transition and the underlying flow mechanism are core issues in fluid physics, especially in the underwater propulsion systems. Inflow velocity variation alters local flow structure and pressure distribution, regulating cavitation inception and critical collapse in pump-jet propulsors (PJPs). This stud...
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