Effect of Molecular Additives on Ignition of a Methane-Air Mixture
V. Ya. Agroskin, B. G. Bravyi, G. K. Vasil'ev, V. I. Gur'iev, S. A. Kashtanov, E. F. Makarov, S. A. Sotnichenko, Yu. A. Chernyshev
Institute for Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Russia
Keywords: methane-air mixture, molecular additives, supersonic combustion, mathematical modeling, ignition temperature
Abstract
The ignition of a methane-air mixture with additives of ClF5, ClF3, OF2, and H2O2 (additive content in the mixture ≤ 1%) is studied by numerical simulation. The ignition temperature of the mixture is determined as a function of the initial pressure and additive content. It is shown that the introduction of additives into the mixture leads to a significant decrease in the ignition temperature due to the acceleration of the formation of active particles and intensification of the chain mechanism of the process. Of the additives considered, chlorine pentafluoride is the most effective additive, and hydrogen peroxide is the least effective one.
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