Numerical and Experimental Investigation of Hydrodynamic Mechanisms in Erosive Sheet Cavitation
Licentiate thesis, 2018
In this thesis, the dynamics of cavitating flows over a NACA0009 foil are investigated using numerical and experimental methods. The shedding behavior of cavity structures is analyzed based on the results from the numerical simulations and high-speed videos. For erosion assessment, the location of erosive collapses in the cavitating flow is determined using a paint test method. These locations and the detectable collapse events in the high-speed videos are used to find the relation between the erosion patterns and cavitation dynamics. In order to numerically assess the areas with high risk of cavitation erosion, the cavitating flow is simulated using a compressible solver, capable of capturing the shock-waves upon the collapse of cavities. The areas with high risk of cavitation erosion, identified with the compressible solver, is compared with the results from paint test. The results from the compressible solver are used to investigate the hydrodynamic mechanisms of erosive collapses.
High speed visualization
Hydrodynamics mechanisms of cavitation erosion iii
Mohammad Hossein Arabnejad Khanouki
Chalmers, Mechanics and Maritime Sciences (M2), Marine Technology
Development and experimental validation of computational models for cavitating flows, surface erosion damage and material loss (CaFE)
European Commission (EC) (EC/H2020/642536), 2015-01-01 -- 2019-01-01.
Areas of Advance
C3SE (Chalmers Centre for Computational Science and Engineering)
Fluid Mechanics and Acoustics
Alfa lecture hall, Saga building, Lindholmen Campus
Opponent: Dr. Evert-Jan Foeth, Maritime Research Institute Netherlands, Netherlands