By using the counterflow method, the laminar flame speeds of methane/(Ar, N2, CO2)-air mixtures have been accurately and extensively determined over the stoichiometric range from very lean to very rich, the pressure range from 0.25 to 2 atm, and flame temperature range from 1,550 to 2,250 K; independent variation in the flame temperature is achieved by substituting nitrogen in the air by an equal amount of argon or carbon dioxide. These data are expected to be useful for the partial validation of proposed kinetic mechanisms. In the present study numerical simulation of the experimental flame speeds has been conducted by using a C1 mechanism and a full C2 mechanism. The calculated results agree well with the experimental data, for both the C1 and C2 mechanisms, except for very rich mixtures for which there is substantial overprediction by the C2 mechanism. Sensitivity analyses have also been performed where appropriate for enhanced insight into the controlling elementary reactions.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology
- Mechanical Engineering
- Physical and Theoretical Chemistry
- Fluid Flow and Transfer Processes