Structure and properties of detonation in a liquid-gas buble system

Bubble detonation as a self-sustained solitary wave with energy release

“…Energy release in the bubbles leads to a 10-30% increase in the bubble detonation velocity compared to a solitary wave in an inert medium [3,4,6]. The velocity and the formation of the pressure profile of bubble detonation waves are affected primarily by the nonlinear and dispersion properties of the medium.…”

“…In [1][2][3][4][5][6], it is noted that the bubble detonation parameters are determined by the initial properties of the gas-liquid medium (volume concentration of bubbles β 0 and liquid viscosity μ 1 ) and that a bubble detonation wave and a solitary wave in an inert liquid [4] have close properties and structures. Energy release in the bubbles leads to a 10-30% increase in the bubble detonation velocity compared to a solitary wave in an inert medium [3,4,6].…”

“…The bubbles being compressed in a pressure field explode and generate shock waves into the ambient medium, which, in turn, compress and ignite the bubbles upstream. In support of this mechanism in a bubble detonation wave, all oscillograms [4] record pressure oscillations from a separate bubble with an amplitude of up to 50-80 MPa and short-wave radiation ahead of the wave with a period l /c liq , where c liq is the sound velocity in the liquid. In the present paper, bubble detonation is modeled by obtaining an averaged analytical solution from the system of equations describing waves in a bubble medium to take into account the collective resonance effect and the mutual influence of the bubbles.…”

“…Self-sustained waves of bubble detonation were first found experimentally and studied [1][2][3][4][5][6] in two types of systems with a low energy release: an inert liquidexplosive gas bubbles [1,2]; a combustible liquidoxygen bubbles [3]. Those studies showed that a bubble detonation wave propagated bubble detonations in a tube 5 m long with an average uniform distribution of bubbles, and its steady-state velocity did not depend on the method and intensity of initiation.…”

Bubble detonation conditions

“…In the first series of experiments, records of the pressure and glow in the bubble medium in the tube cross section at the location of transducer 11 show that the igni- tion of the bubbles occurs near the leading shock front. From [7], it follows that in the bubble detonation wave, the breakup of large bubbles into small ones with sizes less than 0.2-0.5 mm occurs in a time of about 100 μsec. If there is no ignition of large bubbles (p 0i p * 0i ) at the front 1, then, at the moment of arrival of the next wave, the medium contains only small-size bubbles, which are not ignited because of weak compression.…”