Specific features of nonisothermic branched-chain reactions and new aspects of theory

Based on the study of the specific features of nonisothermic regimes in bra nched-chain processes it was shown that the chain mechanism is the main fac tor that determines gas-phase combustion not only at very low pressures (as it was considered until recently), but also at atmospheric and higher pres sures both in the course of the developed combustion and under the conditio ns of explosion, flame propagation, and the origination of detonation. Alon g with kinetic mode combustion caused only by the chain avalanche, which is accelerated by self-heating, the regime of thermal-chain explosion was rev ealed, in which both the chain avalanche and heat accumulation in the syste m are progressively accelerated. The conditions for the transition of one r egime into another and the specifics of the temperature dependence of the c hain process rate are discussed. The data are presented on the suppression of ignition, developed combustion, explosion, and deflagration-detonation t ransition by highly-efficient environmentally clean inhibitors at 1 and 5 a tm. Some new aspects of the theory are considered.