Overall reaction concept in premixed, laminar, steady-state flames. I - Stoichiometries

Journal Article · Thu Dec 01 00:00:00 EST 1983 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(83)90029-9· OSTI ID:6547093

Coffee, T P; Kotlar, A J; Miller, M S

Combustion processes normally involve a large number of chemical species, related through a complicated reaction network and strongly interacting with the fluid flow and molecular transport. A common approach is to simplify the system by assuming a single overall or 'global' reaction. In this paper, the adequacy of the overall reaction model for premixed, laminar, one-dimensional, steady-state flames are examined. The procedure is first to solve the equations governing the detailed chemistry model. The overall reaction rate parameters are then found from a least squares fit of the heat release profile. The overall reaction model equation can then be solved and the solution compared with the detailed model solution. This is done for three different flames over a range of stoichiometries. The single-reaction model gives quite accurate results for flame speed. The temperature and heat release profiles are also generally accurate. The accuracy of the major species profiles varies from fair to good. However, the optimal overall kinetic parameters do vary with stoichiometry. 17 references.

• Research Organization: U.S. Army, Aberdeen Proving Ground, MD
• OSTI ID: 6547093
• Journal Information: Combust. Flame; (United States), Vol. 54
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FLAMES
CHEMICAL REACTIONS
COMBUSTION
FLAME PROPAGATION
LAMINAR FLOW
METHANE
REACTION KINETICS
STEADY-STATE CONDITIONS
STOICHIOMETRY
TWO-PHASE FLOW
ALKANES
FLUID FLOW
HYDROCARBONS
KINETICS
ORGANIC COMPOUNDS
OXIDATION
THERMOCHEMICAL PROCESSES
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry