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Combustion, Explosion and Shock Waves

2019 year, number 1

On the Effect of Combustion Inhibitors on the Level of Non-Equilibrium Radiation during Ignition of Hydrogen Oxygen Mixtures behind a Shock Wave

A. V. Eremin1, M. R. Korshunova1,2, E. Yu. Mikheeva1,2
1Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412 Russia
2Bauman Moscow State Technical University, Moscow, 105005 Russia
Keywords: воспламенение водорода, ингибирование, взрывобезопасность, неравновесное излучение, hydrogen ignition, inhibition, explosion safety, non-equilibrium radiation

Abstract

The nonequilibrium radiation arising from the ignition of a 10 % stoichiometric hydrogen-oxygen mixture doped with combustion inhibitors and diluted with argon behind shock waves was studied. The addition of halogen-containing inhibitors led to increased UV radiation around the 220 and 411 nm wavelengths characteristic of the HO2 radical and H2O2 and H2O molecules, instead of the expected reduction in the super-equilibrium radiation of active radicals in the ignition zone. Therefore, the hypothesis about the inhibition mechanism due to extinguishing by the excited HO2* radical is not confirmed, and the effect of inhibiting additives is due to the binding of H and O atoms.