4.6 Article

The Period of Ignition Delay for Methane-Air Mixture with Hydrogen and Ethylene Additives

期刊

APPLIED SCIENCES-BASEL
卷 11, 期 22, 页码 -

出版社

MDPI
DOI: 10.3390/app112210515

关键词

ignition delay period; methane-air mixture; hydrogen; ethylene; kinetic model; experimental data; validation

资金

  1. Ministry of Science and Higher Education of the Russian Federation [075-15-2020-806]

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The article investigates the impact of adding hydrogen and/or ethylene on the ignition efficiency of methane-air mixtures, using experimental determination and numerical modeling to study the ignition dynamics. Results show that adding hydrogen and ethylene could reduce the ignition delay period of methane-air mixtures.
The article is devoted to estimating the intensifying efficiency of methane-air ignition by adding a small amount of hydrogen and/or ethylene. It presents features of the experimental determination of the ignition delay period for fuel-air mixtures using shock installation and methods of processing empirical data. The testing of the known ignition kinetic models for methane, hydrogen, and ethylene with air was carried out. The results of test calculations were compared with those previously published, as well as original experiments. The kinetic model was chosen to provide the minimum discrepancy between the calculated and experimental data. The regularities of the effect of hydrogen and ethylene additives on the ignition dynamics of the methane-air mixture for the range of initial pressures from 1 to 8 bar at temperatures from 900 to 1100 K were obtained with the use of non-stationary numerical modeling. Methane-air mixtures with the mass fraction of additives not exceeding 10% were studied. The quantitative indicators of possible reduction in the ignition delay period of methane-air mixtures were detected.

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