This article is cited in 2 papers

Focusing of the rarefaction wave in a thin cavitating fluid layer with a free boundary

E. S. Zhuravleva, V. K. Kedrinskii

Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

Abstract: A new method of focusing the rarefaction wave in a one-dimensional axisymmetric formulation is proposed. The method is based on shock wave generation initiated by motion of a piston coaxial with the axis of symmetry with a prescribed pulse profile for the maximum velocities of 20 to 100 m/s and the exponent decay constant up to 10 $\mu$s. It is found that reflection of the shock wave from the free boundary generates a rarefaction wave propagating toward the axis of symmetry with increasing amplitude, and a cavitation zone is formed and developed behind the wave front.

Keywords: shock wave, rarefaction wave, focusing, cavitation process.

UDC: 532.593+532.528

Received: 12.11.2018

DOI: 10.15372/PMTF20180605

 English version: Journal of Applied Mechanics and Technical Physics, 2018, 59:6, 1004–1007

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