EXPERIMENTAL-STUDY OF DETONATING GAS BUBBLE OSCILLATIONS USING A SHOCK-TUBE

Oscillations of bubbles containing a mixture of a detonating gas with argon in their interior are studied. The bubbles are excited for oscil lations by a pressure step generated in a shock tube. A bubble wall mo tion is observed by a rotating mirror camera and a radiated pressure w ave by a needle hydrophone. For weak pressure steps the bubble behaves as an ordinary gas bubble. However, above a certain pressure step thr eshold ignition of the detonating gas occurs. Due to released heat the bubble oscillation intensity is amplified. The data obtained are used to estimate pressures and temperatures in the compressed bubble.