Attenuation of Shock Waves in Bubbly Media

Abstract

Experiments on the attenuation of spherical shock waves were carried out in a vessel and a shock tube filled with a two-phase gas babble–water mixture with a gas volume fraction of β = 2.3–26%. The attenuation of the spherical blast wave generated by a charge directly into a two-phase medium proved to be more effective than in the case of using bubble screens. Experiments have shown that, at β = 2.3%, the intensity of spherical shock waves decreases 20-fold, whereas at β = 26%, by a factor of 40–50. A bubble layer enhances the dynamic effect on the barrier for extended waves and weakens it in the case of short-pulse disturbances. The degree of attenuation or amplification of the blast wave depends on the thickness of the layer, pulse duration, and volume fraction of bubbles.