Experimental Study of Methane Combustion Efficiency in a High-Enthalpy Oxygen-Containing Flow

In this paper it is shown that under certain conditions under reverse gravity, acoustics increase the stability of the flame in comparison with normal gravity. It is shown that there is a hysteresis in the V–M and M–V transitions under reverse gravity as well as under normal one. In contrast to normal gravity, the conditions for hysteresis degeneracy under reverse gravity are proven to be independent of the excitation frequency.

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Inverted conical methane/air flame shape transformation under acoustic excitation: Gravity impact

Krikunova

Saveliev

Cheshko

2022

Physics of Fluids

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Ignition and Combustion of Synthetic High Molecular Weight Hydrocarbons in High-Enthalpy Air Flow

Yanovskiy,

Varaksin,

Aref’ev

et al. 2023

Combust Explos Shock Waves

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Study of Forced Acoustic Oscillations Influence on Methane Oxidation Process in Oxygen-Containing Flow of Hydrogen Combustion Products

Krikunova,

Arefyev,

Grishin

et al. 2024

Heat Trans Res

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The article presents the results of a computational and experimental study of the acoustic intensification of methane oxidation processes in high-enthalpy oxygen-containing flow of hydrogen combustion products. The studies were conducted by using a duct with constant cross section and finite length. Initial specific enthalpy of the oxygen-containing flow is varied from 1600 kJ/kg to 2400 kJ/kg. The patterns of total enthalpy influence of the oxygen-containing flow of hydrogen combustion products and acoustic effect on the efficiency (completeness of chemical reactions) of methane oxidation were obtained. The dependence of acoustic frequency influence on the coefficient of completeness of physicochemical processes has been found. The values of fuel equivalence ratio were determined for various total enthalpies of the oxygen-containing flow, corresponding to diffusive and kinetic regimes of methane oxidation. The stability of methane oxidation process and the influence of forced acoustic oscillations on the spectral characteristics of static pressure pulsations in the flow were analyzed.

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Experimental Study of Methane Combustion Efficiency in a High-Enthalpy Oxygen-Containing Flow

Cited by 4 publications

References 54 publications

Inverted conical methane/air flame shape transformation under acoustic excitation: Gravity impact

Inverted conical methane/air flame shape transformation under acoustic excitation: Gravity impact

Ignition and Combustion of Synthetic High Molecular Weight Hydrocarbons in High-Enthalpy Air Flow

Study of Forced Acoustic Oscillations Influence on Methane Oxidation Process in Oxygen-Containing Flow of Hydrogen Combustion Products

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