Accession Number : AD0773480

Title :   The Effect of Strain on Diffusion Flames.

Descriptive Note : Technical rept.,

Corporate Author : PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS

Personal Author(s) : Carrier,George F. ; Fendell,Francis E. ; Marble,Frank E.

Report Date : OCT 1973

Pagination or Media Count : 71

Abstract : Several steady-state and time-dependent solutions to the compressible conservation laws describing direct one-step near-equilibrium irreversible exothermic burning of initially unmixed gaseous reactants, with Lewis-Semonov number unity, are presented. The quantitative investigation first establishes the Burke-Schumann thin-flame solution using the Shvab-Zeldovich formulation. Real flames do not have the indefinitely thin reaction zone associated with the Burke-Schumann solution. Singular perturbation analysis is used to provide a modification of the thin-flame solution which includes a more realistic reaction zone of small but finite thickness. The particular geometry emphasized is the unbounded counterflow such that there exists a spatial constant rate of strain along the flame. (Modified author abstract)

Descriptors :   *Exhaust flames, *Reaction kinetics, Combustion, Turbulence, Thermal diffusion, Turbulent diffusion, Nonequilibrium flow

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE