Effect of heat losses on the limits of stability of premixed flames propagating downwards
โ Scribed by Paul Clavin; Colette Nicoli
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 894 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0010-2180
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โฆ Synopsis
A previously developed theory of linear stability analysis of nonadiabatic premixed flames that was based on a diffusive thermal model is extended by eliminating the hypothesis of negligible expansion of the gas. The effects of heat losses on the limit of stability of slow burning flames propagating downward are investigated in detail. The influence of the proximity of the flammability limits upon the stability limits is studied with a view to describing the cellular threshold for flames propagating in tubes.
๐ SIMILAR VOLUMES
The evolution of a premixed flame under conditions of confinement is studied theoretically. The analysis is based on a hydrodynamic model in which the flame is treated as a surface of discontinuity. The flame structure is assumed to be quasi-steady with a high activation energy and a large heat rele
Direct numerical simulations of a passive premixed flame surface propagating through stationary isotropic turbulence have been performed in three dimensions on a 963 mesh with a particular emphasis on characterizing the effect of Lewis number on the rate of propagation of the flame surface and flame
Experimental measurements of density and OH radical concentration have been compared with a theory which predicts the concentrations of product and of a reactive intermediate in a plane premixed flame propagating into grid turbulence. The theory is based on the simplest version of the Bray and Libby