Systematic development of reduced reaction mechanisms for dynamic modelingA method for systematically developing a reduced chemical reaction mechanism for dynamic modeling of chemically reactive flows is presented. The method is based on the postulate that if a reduced reaction mechanism faithfully describes the time evolution of both thermal and chain reaction processes characteristic of a more complete mechanism, then the reduced mechanism will describe the chemical processes in a chemically reacting flow with approximately the same degree of accuracy. Here this postulate is tested by producing a series of mechanisms of reduced accuracy, which are derived from a full detailed mechanism for methane-oxygen combustion. These mechanisms were then tested in a series of reactive flow calculations in which a large-amplitude sinusoidal perturbation is applied to a system that is initially quiescent and whose temperature is high enough to start ignition processes. Comparison of the results for systems with and without convective flow show that this approach produces reduced mechanisms that are useful for calculations of explosions and detonations. Extensions and applicability to flames are discussed.
Document ID
19870046713
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Frenklach, M. (Pennsylvania State University University Park, United States)
Kailasanath, K. (Pennsylvania State Univ. University Park, PA, United States)
Oran, E. S. (U.S. Navy, Naval Research Laboratory, Washington DC, United States)