Abstract
Combustible aqueous foams and foamed emulsions represent prospective energy carriers. This paper is devoted to the overview of model assumptions required for numerical simulations of combustion and detonation processes in aqueous foams. The basic mathematical model is proposed and used for the analysis of the combustion development in the wet aqueous foam containing bubbles filled with reactive gas. The numerical results agree with the recent experimental data on combustion and detonation in aqueous foams containing premixed hydrogen–oxygen. The obtained results allowed for distinguishing the mechanisms of flame acceleration, transition to detonation, detonation propagation, and decay.
Highlights
The development of new technologies for efficient and clean energy is one of today’s topical challenges
Such an accumulative mechanism is realized at the later stages of flame acceleration as well when the flame achieves the maximal speed of CJ deflagration, which is of the order of sonic speed in the combustion products [38]
We propose a numerical model and present new results on flame acceleration and detonation onset, propagation, and decay in hydrogen–oxygen microfoam
Summary
The development of new technologies for efficient and clean energy is one of today’s topical challenges. In the paper [8], the effect of energy focusing on the scales of a single bubble collapsing under compression was proposed as a mechanism driving the detonation propagation. These conclusions were made based on an integral understanding of the process dynamics.
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