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- W2981704744 abstract "The vertical water-entry of a cylinder with a flat bottom at a high-speed impact velocity is investigated numerically in this paper. The multiphase solver is based on the reduced five-equation model and adopts a pressure relaxation method. The fluid is assumed as inviscid and compressible. The effect of gravity is neglected because of the high Froude number and short loading period. A series of numerical experiments are conducted, and the influence of the impact velocity and aeration effect on the slamming loads are studied. The results show that the compressibility of the fluid is important as the impact velocity increases and the acoustic pressure underestimates the maximum impact pressure. Moreover, as the aeration level grows, both the impact loads and the affected area will decrease. Simplified theoretical equations based on the shock jump relation are proposed to predict the maximum impact loads, showing a good agreement with the numerical results. The dimensional analysis results show that the impact loads in pure and aerated water follow the same relation vs Mach number, which can be used to measure the high-speed impact force at a lower impact velocity in aerated water." @default.
- W2981704744 created "2019-11-01" @default.
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- W2981704744 date "2019-10-01" @default.
- W2981704744 modified "2023-10-16" @default.
- W2981704744 title "Numerical study of hydrodynamic loads at early stage of vertical high-speed water entry of an axisymmetric blunt body" @default.
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- W2981704744 doi "https://doi.org/10.1063/1.5121283" @default.
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