Shock Amplification by Bubbly Systems with Energy Release (SABSER)

摘要

The results of numerical analysis of wave processes in passive bubbly media carried out within the framework of two-phase mathematical model are presented. Such media can be considered as the active ones which are able to absorb and to reradiate acoustic pulses and thus to play a role of active media in a problem of "acoustic laser". Passive system is presented as a spherical bubbly cluster which is excited by stationary plane shock wave. This process can be considered as the hydrodynamical analogy of a "pump" in laser systems. It was found that the different velocities of wave propagation in a cluster and surrounded liquid result in the effect of shock wave focusing inside cluster which generates a powerful acoustic pulse. The dependences of its amplitude on the parameters of bubbly system and incident wave are discussed.