Cavitation Behaviors around NACA 64108 Hydrofoil

摘要

Cavitating flows occur in all hydraulic machineries. Performance of different applications such as submarine propulsion and hydropower turbines is affected by cavitation. Cavitation from submarine propellers generates unwanted noise, while hydro turbine cavitation causes enormous yearly maintenance costs for the hydropower industry. This paper presented numerical works made with a commercial CFD code, CFX-5. Calculations were performed for NACA 64108 hydrofoil by solving the time-averaged turbulent Navier-Stokes equations and discretized by finite volume method. The different cavitation regimes in which appear at the hydrofoil were classified according to the values of cavitation number, surface roughness and angle of attack.