This article is cited in 11 papers

Gases and Fluids

Determination of the dimension of a cavity in water behind a fast-moving cylindrical body

S. V. Fedorov, V. A. Veldanov

Bauman Moscow State Technical University

Abstract: The cavity formation behind cylindrical bodies with variously shaped noses moving in water at velocities from 400 to 2000 m/s is investigated by numerically simulating a 2D axisymmetric gasdynamic problem under the assumption of an ideal compressible liquid. With regard to calculation and experimental data, a simple model of the process is proposed that considers the inertial expansion of a spherical cavity in an ideal incompressible liquid. It is shown that the collapse of a cavity behind a body moving in a liquid with backpressure may give rise to cumulative phenomena with the formation of a fast liquid jet running in the wake of the body.

Received: 10.01.2012

 English version: Technical Physics, 2013, 58:2, 165–169

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