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Abstract— <p>The article is devoted to the experimental measurement of ignition delay times of ammonia with additives of CH<sub>4</sub>, C<sub>2</sub>H<sub>2</sub>, C<sub>2</sub>H<sub>4</sub>, and C<sub>2</sub>H<sub>6</sub> behind shock waves and their comparison with the results of numerical simulation using modern kinetic models. A significant discrepancy between the predictions of kinetic mechanisms and the experimental data is demonstrated. The analysis of the sensitivity of the ignition delay time to the rate constants of individual reactions indicates the key role of insufficiently studied reactions of interaction of HO<sub>2</sub> and NH<sub>2</sub> radicals, as well as reactions involving N<sub>2</sub>H<sub><i>x</i></sub> compounds, in the ignition of ammonia at elevated temperatures.</p>

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Experimental and Numerical Investigation of Ignition of Ammonia–Hydrocarbon Mixtures in Shock Tube Conditions

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • A. V. Drakon,
  • A. V. Eremin

摘要

Abstract—

The article is devoted to the experimental measurement of ignition delay times of ammonia with additives of CH4, C2H2, C2H4, and C2H6 behind shock waves and their comparison with the results of numerical simulation using modern kinetic models. A significant discrepancy between the predictions of kinetic mechanisms and the experimental data is demonstrated. The analysis of the sensitivity of the ignition delay time to the rate constants of individual reactions indicates the key role of insufficiently studied reactions of interaction of HO2 and NH2 radicals, as well as reactions involving N2Hx compounds, in the ignition of ammonia at elevated temperatures.