Development of cavitation in a slit channel on a hydrofoil with a smooth and textured surface
M.V. Kashkarova1, S.G. Skripkin1,2, M.A. Tsoi2, A.Yu. Kravtsova1,2
1Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: high-speed imaging, CFD modeling, cavitation, periodic roughness, NACA 0012 hydrofoil, STAR CCM+
Abstract
This work deals with the study of cavitation in a slit channel when flowing around NACA 0012 hydrofoils with smooth and periodic roughness on the surface. The research was aimed at the description of the dynamics of cavitation cavity development on smooth and rough hydrofoils and determination of differences between them. Computer modeling of cavitation flow in a slit channel formed behind an obstacle in the form of a wing was performed in the modern CFD package STAR CCM+. Visualization was obtained, computer modeling was carried out in a wide range of parameters, and a comparison with experimental data on the cavitating flow was made. The effect of periodic roughness on the features of occurrence and development of a cavitation cavity on the hydrofoil is described. The flow structure in roughness cells is shown. The obtained results can be used to control effectively the cavitation process in slit sections of various hydraulic engineering devices.
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