Attenuation of blast overpressures from liquid in an elastic shell

Parameters of air blast waves produced by a ground explosion of explosive c harges of mass G = 0.1-1 kg placed in a liquid bounded by an elastic shell were measured experimentally. Encapsulation of the liquid in the elastic sh ell leads to an increase in the compressibility of the medium which transfe rs the energy of explosion products to the air and contributes to a signifi cant decrease in air-blast amplitude at a reduced distance R/G(1/3) = 0.63- 6.8 m/kg(1/3). The efficiency of attenuation of overpressures by immersing an explosive in a liquid bounded by an elastic shell is comparable to effic iency of damping blast waves by gas-filled two-phase systems. It is shown t hat the main parameter of blast-wave attenuation is the ratio of the mass o f the liquid to the mass of the explosive charge rather than the viscosity and density of the liquid.