The role of branching-chain mechanism in gas phase combustion is considered. The results of experimental and theoretical investigations show that contrary the accepted for a long time views, branching-chain mechanism ...The role of branching-chain mechanism in gas phase combustion is considered. The results of experimental and theoretical investigations show that contrary the accepted for a long time views, branching-chain mechanism of the reaction, competition of chain branching and termination determine the origin and features of gas phase combustion of almost all compounds not only at pressures below atmospheric dozen times, but also at atmospheric and elevated pressures, in conditions of any self-heating. The latter becomes important in the course of developing chain combustion and enhances the chain avalanche. Kinetic methods for controlling combustion, explosion and detonation of gases have been developed by taking into account the decisive role of chain avalanche in these processes. The approach is based on purposeful variation of the rates of the competing reactions of chain branching and termination by means of special small additives. Suggested methods enable not only prevent combustion and explosion, but also adjust the intensity of the process, deflagration to detonation transition and destroy stationary detonation wave at a given distance from the place of its origin.展开更多
文摘The role of branching-chain mechanism in gas phase combustion is considered. The results of experimental and theoretical investigations show that contrary the accepted for a long time views, branching-chain mechanism of the reaction, competition of chain branching and termination determine the origin and features of gas phase combustion of almost all compounds not only at pressures below atmospheric dozen times, but also at atmospheric and elevated pressures, in conditions of any self-heating. The latter becomes important in the course of developing chain combustion and enhances the chain avalanche. Kinetic methods for controlling combustion, explosion and detonation of gases have been developed by taking into account the decisive role of chain avalanche in these processes. The approach is based on purposeful variation of the rates of the competing reactions of chain branching and termination by means of special small additives. Suggested methods enable not only prevent combustion and explosion, but also adjust the intensity of the process, deflagration to detonation transition and destroy stationary detonation wave at a given distance from the place of its origin.
