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

Abstract

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.