✦ LIBER ✦

Flame propagation in a nonuniform mixture: Analysis of a slowly varying Triple Flame

✍ Scribed by J.W. Dold

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 828 KB
Volume: 76
Category: Article
ISSN: 0010-2180
DOI: 10.1016/0010-2180(89)90079-5

No coin nor oath required. For personal study only.

✦ Synopsis

For flames propagating through a nonuniform medium a three-flame structure is described. This consists of a fuelrich premixed flame, a fuel-lean premixed flame, and, starting where these flames meet, a diffusion flame. Such formations have been observed experimentally and probably occur as laminar flamelets in turbulent diffusion flames. A low-heat-release model for such flame structures is developed and solutions are obtained in the limit of slowly varying premixed flames. Under these conditions, it is shown that the Triple-Flame propagation speed depends on the transverse mixture fraction gradient and is bounded above by the maximum adiabatic laminar flame speed of the system.

📜 SIMILAR VOLUMES

Turbulent flame propagation in a homogen

Turbulent flame propagation in a homogeneous gas mixture

✍ Henry S. Sanematsu 📂 Article 📅 1969 🏛 Elsevier Science 🌐 English ⚖ 548 KB

A model of flame propagation in rich mix

A model of flame propagation in rich mixtures of coal dust in air

✍ Scott E. Slezak; Richard O. Buckius; Herman Krier 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 995 KB

A two-phase combustion model describing fundamental coal dust flame propagation phenomena is developed to treat general fuel rich mixtures. The model includes heterogeneous combustion, pyrolysis of the coal, and homogeneous combustion of volatile matter and the optically thick limit for radiative he

Propagation and extinction of a flame in

Propagation and extinction of a flame in a stagnation-point flow

✍ Y.D. Kim; M. Matalon 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 583 KB

Numerical investigation of steady lamina

Numerical investigation of steady laminar flame propagation in a circular tube

✍ Shih Tuen Lee; Chien Hsiung Tsai 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 457 KB

The steady propagation of a premixed laminar flame in circular tubes with adiabatic wall and isothermal wall is numerically investigated in the present study. It is assumed that the flow is axisymmetric and the flame chemistry is modeled by an one-step overall reaction which simulates the reaction o

Homogenization and flame propagation in

Homogenization and flame propagation in periodic excitable media: The asymptotic speed of propagation

✍ L. A. Caffarelli; K.-A. Lee; A. Mellet 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 197 KB

The concentration limits for coal dust-a

The concentration limits for coal dust-air mixtures for upward propagation of flame in a vertical tube

✍ B.A. Maguire; C. Slack; A.J. Williams 📂 Article 📅 1962 🏛 Elsevier Science 🌐 English ⚖ 615 KB

The upper and lower limits of concentration for upu, ard propagation of flame in a vertical tube are given on a probability basis for coal dust-air mixtures. The 0.5 probability value of the lower limit varied from 0.23 to 0.31 g/1. and the upper limit varied from 2.07 to 1.02 g/l.; the actual value