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- W2334289439 abstract "Experimental measurements of burning rates and analyses of key reaction pathways and sensitive rate constants were performed for lean hydrogen flames with the addition of small concentrations of C1-C2 hydrocarbons. Pressures from 1-25 atm and (diluted) low flame temperatures were studied. The species added individually to hydrogen were CO, CH4, C2H4, and C2H6, each at a molar ratio of H2 to additive of nine to one. Flame speeds were measured using outwardly propagating flames. While results show good agreement of all model predictions with experimental data at 1 atm, large discrepancies among model predictions and with experimental data are observed at higher pressures. Kinetic analyses were performed to identify controlling kinetic pathways and major sources of disagreement. Differences in the H2 submodel were demonstrated to be largely responsible for differences among various model predictions, though predictions of the various models using a common H2 submodel still yield burning rate predictions that vary substantially. Sensitivity analysis indicates that reactions of CH3 with major radical species, CH3+H(+M)=CH4(+M) and CH3+HO2=CH3O+OH, and HCO consumption pathways, HCO+M=H+CO+M and HCO+O2=CO+HO2, become increasingly important with hydrocarbon addition to H2/additive mixtures in flames at high pressure and low flame temperature." @default.
- W2334289439 created "2016-06-24" @default.
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- W2334289439 date "2011-01-04" @default.
- W2334289439 modified "2023-09-27" @default.
- W2334289439 title "High Pressure Burning Rates and Model Comparisons for High-Hydrogen CO, CH4, C2H4, and C2H6 Mixtures" @default.
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- W2334289439 doi "https://doi.org/10.2514/6.2011-242" @default.
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