Water Cavitation During Electrohydropulse Stamping

The influence of cavitation effects during electrohydropulse stamping is considered. The effect of cavitation in the working fluid on the inner surface of the discharge chamber and its destruction is shown. A one-dimensional model of bubbly liquid has been developed that enables estimating the change in the pressure pulse parameters in presence of a layer of bubbles of different porosity near the chamber wall. The problem was solved by the finite difference method, with a numerical implementation in C++. The correctness of the model was verified by comparison with a test calculation of a similar problem for a homogeneous compressible fluid, modeled in LS-DYNA 971 complex. It is shown that a layer of bubbly liquid makes it possible to almost double the pressure amplitude on the rigid wall of the chamber and removes the reflected shock wave under the conditions of electrohydropulse stamping. The obtained results can become the basis for creating more efficient technological processes and devices for EHS.