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The laminar flame speed is one of the most important combustion properties of a combustible mixture. It is an important target for chemical mechanism validation and development, especially at fuel-lean and high pressure conditions. In this study, the laminar flame speeds of two types of lean high-hydrogen syngas/oxygen/helium mixtures were measured at normal and evaluated pressures up to 10atm using...
Laminar flame speeds and Markstein lengths of H2/CO with CO2 dilution were measured at normal and elevated pressures (0.1MPa, 0.5MPa, 1.0MPa) and temperatures (298K, 375K, 450K) using outwardly propagating spherical flame method. Simulation considering detailed chemistry and transport was conducted to examine the effects of radiation re-absorption of CO2 dilution on flame propagation. The laminar...
Synthetic gas, or syngas, is a popular alternative fuel for gas turbine industry. However, the composition of syngas is complex which complicates the combustor design. In this study, a dual-chambered pressure-release type combustion apparatus was developed and used for measurements of laminar flame speed which could be operated at high pressures and temperatures. The laminar flame speeds of syngas...
The effect of nonspherical (i.e. cylindrical) bomb geometry on the evolution of outwardly propagating flames and the determination of laminar flame speeds using the conventional constant-pressure technique is investigated experimentally and theoretically. The cylindrical chamber boundary modifies the propagation rate through the interaction of the wall with the flow induced by thermal expansion across...
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