Abstract
It is well known that the propagation of traditional combustion and detonation waves was determined by the branched chain reactions discovered by Academician N.N. Semenov. This article discusses a new type of detonation waves initiated by chemical condensation processes. Chemical condensation waves arise as a result of the heat released during the explosive condensation of a highly supersaturated carbon vapor formed as a result of the dissociation of the initial carbon-containing molecules behind the front of the initiating shock wave. Unlike traditional combustion and detonation waves, the mechanism of chemical condensation does not include branched chain reactions; nevertheless, the laws of propagation of detonation waves of condensation are clearly described by the Zel’dovich–Neumann–Döring theory.
Highlights
The overwhelming part of the energy consumed by mankind is produced as a result of the combustion processes of hydrocarbon fuels, which are based on the discovered by Academician N.N
From a practical point of view, heat release during condensation can make a certain contribution to the combustion and detonation of gaseous hydrocarbons, which prevail in practice and nature, since most of these processes are accompanied by the formation of condensed carbon particles [2–4]
If this energy is so great, is it possible to generate a wave supported only by the heat released from condensation? At first glance, the answer to this question should most likely be negative: unlike ignition reactions, the condensation process does not accelerate with increasing temperature, there are no branched chain mechanisms, and the growth of condensed particles may require millions of collisions
Summary
The overwhelming part of the energy consumed by mankind is produced as a result of the combustion processes of hydrocarbon fuels, which are based on the discovered by Academician N.N. This set of processes, in contrast to the wellknown physical condensation, was called chemical condensation by the authors In such a situation, the process of vapor formation due to the dissociation of the initial molecules will exponentially accelerate with increasing temperature, and the subsequent exothermic recombination condensation reactions will provide a rapid and intense heat release. Another important feature of carbon suboxide pyrolysis is that the rate-limiting stage (bottleneck) of the entire process, up to the formation of condensed particles, is the reaction of carbon vapor formation, the rate of which exponentially increases with increasing temperature [7] This rather unique exothermic carbon compound, which does not contain hydrogen, turned out to be the ideal model substance for studying the problem of the appearance and propagation of a chemical condensation wave.
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