@inproceedings{1e93f4076402479ca6cf8d3b3f49d5b0,
title = "Effect of inert and reactive gases on stability of high-speed hydrogen micro jet flame",
abstract = "Experimental data are presented on the effect of inert (He, N2, Ar, CO2) and reactive (SH4, O2, CF3Br, (CH3O)3PO) gas additives to hydrogen flow and ambient air on flame separation during diffusion combustion of a hydrogen microjet emanating from a round micronozzle into air. The micronozzle is a stainless steel tube with an inner diameter of 0.5 mm, a length of 30 mm, and a wall thickness of 0.1 mm. The shadow method is used to determine the critical hydrogen velocity at which the flame of the hydrogen microjet separates from the nozzle upon injection of additives into air and into the hydrogen flow. It is found that the addition of the above gases to hydrogen narrows the microjet velocity range in which stabilization of the flame can be achieved with injection of both inert and reactive additives. For the hydrogen flow with the additives studied, the critical velocity of flame separation from the micronozzle depends primarily on the mean molecular weight of the gas mixture. In the case of the addition of the gases to the air surrounding the diffusion flame, the critical velocity of flame separation is determined by their effect on the chemical reactions of hydrogen oxidation (inhibiting effect) and by the reduction of oxygen concentration due to air dilution with the additive. The results could be of interest to experts in hydrogen energetics for determining the conditions of stable hydrogen microjet combustion and the minimum concentrations of flame-suppressing additives to air preventing the ignition and combustion of hydrogen after its accidental release. ",
author = "Shmakov, {A. G.} and Kozlov, {V. V.} and Litvinenko, {M. V.} and Litvinenko, {Yu A.}",
note = "Funding Information: This work has been supported by the Russian Science Foundation, Project number 16-19-10330. Publisher Copyright: {\textcopyright} 2020 Author(s). Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; 2nd International Conference on Physics and Chemistry of Combustion and Processes in Extreme Environments, ComPhysChem 20-21 and 6th International Summer School on Modern Quantum Chemistry Methods in Applications ; Conference date: 26-07-2021 Through 30-07-2021",
year = "2020",
month = dec,
day = "8",
doi = "10.1063/5.0033840",
language = "English",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
editor = "Azyazov, {Valeriy N.} and Mebel, {Alexander M.}",
booktitle = "International Conference on Physics and Chemistry of Combustion and Processes in Extreme Environments, ComPhysChem 20-21 and VI International Summer School {"}Modern Quantum Chemistry Methods in Applications{"}",
}