✦ LIBER ✦

An integral analysis of the structure and propagation of stretched premixed flames

✍ Scribed by S.H. Chung; C.K. Law

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 680 KB
Volume: 72
Category: Article
ISSN: 0010-2180
DOI: 10.1016/0010-2180(88)90131-9

No coin nor oath required. For personal study only.

✦ Synopsis

The structure and propagation of stretched premixed flames with preferential diffusion are analyzed using an approximate integral approach which yields algebraic relations for the characteristic scales, overall conservation requirements, and balances and continuity between the various scalar properties and their transport rates. Specific flame configurations studied include the one-dimensional steadily propagating planar flame, the steady curved flame in nonuniform flow, and the outwardly/inwardly propagating spherical flame. Linearized results agree with those obtained from asymptotic analysis assuming small stretch. The present work yields enhanced insight into the dominant and coupled physical processes governing these complex flame phenomena, and demonstrates the utility of the integral analysis in theoretical combustion studies.

📜 SIMILAR VOLUMES

The interaction of flame curvature and s

The interaction of flame curvature and stretch, part 2: The convex premixed flame

✍ David W. Mikolaitis 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 363 KB

The interaction of flame curvature and s

The interaction of flame curvature and stretch, part 1: The concave premixed flame

✍ David W. Mikolaitis 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 397 KB

Premixed flames with radii of curvature on the order of the preheat zone thickness are studied with activation energy asymptotics. The changes in flame speed caused by varying the flame stretch as the flame radius is held fixed are calculated. The result of this calculation is that the decrease in f

The unsteady propagation of premixed fla

The unsteady propagation of premixed flames through nonhomogeneous mixtures and thermal gradients

✍ David W. Mikolaitis 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 436 KB

Recent advances in the mathematical study of unsteady laminar premixed flames have required the imposition of nearly constant flame temperature. This condition disallows investigations into such fundamentally important problems as flame propagation into thermal gradients and regions of varying equiv

The effect of reactive intermediates on

The effect of reactive intermediates on the propagation of turbulent premixed flames: Comparison of experiment and theory

✍ M. Azzazy; J.W. Daily; M. Namazian 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 581 KB

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

On the structure and extinction of inter

On the structure and extinction of interacting lean methane/air premixed flames

✍ S.D. Lee; S.H. Chung 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 882 KB

Lean methane/air premixed flames are studied numerically, using a detailed chemical model of 74 reaction steps with 28 species, to investigate the flame interaction between two stretched premixed flames with unequal intensities in a counterflow. The finite difference method, time integration and mod

Experimental study of the structure of s

Experimental study of the structure of several fuel-rich premixed flames of methane, oxygen, and argon

✍ M. Musick; P.J. Van Tiggelen; J. Vandooren 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 1022 KB

A detailed experimental investigation has been performed on the structures of five low-pressure CH4/O2/Ar flames at equivalence ratios of . Stable compounds, atoms and radicals have been monitored using molecular beam mass spectrometry (MBMS). The maximum mole fraction of CH 3 radicals is roughly si