Effects of particles characteristics at high-temperature on bubble dynamic behaviors and acoustic radiation characteristics

In order to investigate the characteristic of the acoustic radiation induced by the interaction between water and high temperature particles produced by underwater combustion of pyrotechnic composition, a bubble dynamic model was deduced based on the heat transfer and mass transfer theory. The effect of initial temperature and radius for high temperature particles on the bubble dynamic behaviors and acoustic radiation characteristics were calculated and analyzed with the burning depth of 1 m. Results show that with the increase of the initial temperature and the radius, the bubbles volume, volume change acceleration and the sound pressure all increase. With the initial temperature of high temperature particle increasing by 200 K, the volume of the bubbles, the volume change acceleration and the sound pressure all increase by an average of 1.01 times, 1.78 times and 1.04 times, respectively. And with the initial radius of high temperature particle increasing by 0.4 mm, the volume change acceleration and the sound pressure all increase by an average of 1.78 times, 2.28 times and 1.15 times, respectively. ©, 2015, Institute of Chemical Materials, China Academy of Engineering Physics. All right reserved.