Numerical Calculation of Cavitation Flow of Viscous Oil Around a Hydrofoil

Cavitation is a widespread phenomenon in fluid machinery and its occurrence can reduce the efficiency and stability of systems and lead to system failures. In this study, the two-dimensional hydrofoil cavitation flow field was numerically calculated using OpenFOAM with industrial white oil of 110 as the flow medium. The results show that the hydrofoil structure has an effect on the size, location and intensity of the cavitation around the hydrofoil. At low inlet velocities, the flow field around the hydrofoil is relatively stable and only produces stable attached cavitation at the head of the hydrofoil, while as the inlet velocity increases, the cavitation area begins to gradually develop and fall off downstream, eventually collapsing and disappearing. At small angles of attack, the vortex of the hydrofoil suction surface caused by the re-entrant jet is close to the wall, while as the angle of attack increases, the vortex begins to gradually increase and move away from the wall, which in turn makes the critical velocity of the transition from attached cavitation to cloud cavitation at large angles of attack decrease. The results of this study provide a theoretical basis and data support for the cavitation flow of viscous oil, which helps to understand the internal cavitation flow of viscous oil fluid components and plays an important role in the development of fluid mechanics.