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Journal of Applied Mechanics and Technical Physics

2017 year, number 5

Dynamics of Discontinuity Formation in a Cavitating Liquid Layer under Shock Wave Loading

E. S. Bolshakova1, V. K. Kedrinskii2
1Novosibirsk State University, Novosibirsk, 630090 Russia
2Lavrent'ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: ударная волна, кавитационный процесс, слой жидкости, разрыв, масштабный фактор, shock wave, cavitation process, liquid layer, discontinuity, scale factor


The problem of experimental modeling of discontinuity formation in a cavitating liquid layer under shock wave loading is considered. It is shown that the discontinuity takes the shape of a sphere segment and retains it up to the closure instant. The discontinuity surface becomes covered with a dynamically growing thin boundary layer consisting of bubbles, which transforms to a ring-shaped vortex bubble cluster at the instant of closure of the discontinuity emitting a secondary shock wave. Specific features of the structure of the cavitating flow discontinuity arising at loading intensities lower than 0.1 and 5 kJ are discussed.