Abstract
Using a specially designed high and constant pressure combustion chamber, the propagation and morphology of spark-ignited expanding spherical methane flames were imaged utilizing schlieren cinematography and a high-speed digital camera. Stretch-free laminar burning velocities were subsequently determined for CH4-air flames ≤ 20 atm and CH4-oxygen-helium flames ≤ 60 atm. Computational simulation using GRI-Mech 3.0 revealed satisfactory agreement with the experimental data ≤ 20 atm, and moderate deviation for pressures > 40 atm. Markstein lengths, global activation energies, and overall reaction orders were also determined as functions of pressure, with the latter two parameters displaying non-monotonic behavior caused by the changeover from H-O2 to HO2 chemistry comparable to that of the explosion limits of homogeneous hydrogen-oxygen mixtures. Original is an abstract.
Original language | English (US) |
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Pages | 13 |
Number of pages | 1 |
State | Published - 2002 |
Event | 29th International Symposium on Combustion - Sapporo, Japan Duration: Jul 21 2002 → Jul 26 2002 |
Other
Other | 29th International Symposium on Combustion |
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Country/Territory | Japan |
City | Sapporo |
Period | 7/21/02 → 7/26/02 |
All Science Journal Classification (ASJC) codes
- General Engineering