𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Laser tomography of turbulent premixed bunsen flames

✍ Scribed by T.C. Chew; R.E. Britter; K.N.C. Bray

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
561 KB
Volume
75
Category
Article
ISSN
0010-2180

No coin nor oath required. For personal study only.

✦ Synopsis

Tomography of premixed propane-Mr flames is described. A laser light sheet formed by multiple reflections between two cylindrical concave mirrors is used to illuminate fine silicone oil droplets suspended in the unreacted mixture, the oil droplets evaporating almost instantaneously across the thin burning interface. The bunsen flame is pilot stabilized with the turbulence generated by a perforated plate situated upstream. Image capture is by 35-ram stills and CCD video. Images are digitized and thence become amenable to various analyses that assist the modeling and understanding of premixed turbulent combustion. A few of the possibilities are demonstrated, while the resolution and possible refinements of the method are discussed.

πŸ“œ SIMILAR VOLUMES

Structure and burning velocity of turbul
Structure and burning velocity of turbulent premixed flames
✍ J. Vinckier; A. Van Tiggelen πŸ“‚ Article πŸ“… 1968 πŸ› Elsevier Science 🌐 English βš– 308 KB

Annular turbulent premixed flames have been stabilized by means of an 'opposed jet burner'. Determinations of the mean gas flow velocity, the intensity of turbulence, the Eulerian scale and the microscale have been made in the flame stabilization region; the thicknees of the flame has been estimated

Structure of laminar flamelets in premix
Structure of laminar flamelets in premixed turbulent flames
✍ Paul A. Libby; Forman A. Williams πŸ“‚ Article πŸ“… 1982 πŸ› Elsevier Science 🌐 English βš– 933 KB

The method of activation energy asymptotics is used to describe the behavior and characteristics of adiabatic laminar flamelets involving counterflowing reactants and products as they arise in premixed turbulent flames. For moderate and low rates of strain the results are analogous to those obtained

Criteria for turbulent propagation limit
Criteria for turbulent propagation limits of premixed flames
✍ R.G. Abdel-Gayed; Derek Bradley πŸ“‚ Article πŸ“… 1985 πŸ› Elsevier Science 🌐 English βš– 444 KB

The limited experimental data on the turbulent quenching of premixed flames have been scrutinized in the light of our theoretical understanding of the role of flame straining at different Lewis numbers, Le. Somewhat diffidently, two regimes are proposed to define flame quenching: 1l I -->~0.71RL Β°.~