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.
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