An application of fractals to modeling premixed turbulent flames

Journal Article · Mon Jun 01 04:00:00 EDT 1987 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(87)90003-4· OSTI ID:6365096

Gouldin, F C

A fractal description of the geometry of rough surfaces is applied to flamelets in premixed turbulent combustion, and a model to predict the turbulent flame speed is developed and tested against experimental data. At low to moderate turbulence levels reaction is known to occur in thin flamelets which are rough with multiple scales of wrinkling. It is hypothesized that flamelets may be represented by fractal surfaces. Comparison of predictions with the data obtained for several different mixtures and for a broad range of turbulence conditions shows good results. While predictions are generally low, absolute values are in most cases within 30% of experimental results. A correction for flame stretch effects is proposed and model predictions are improved thereby.

• Research Organization: Sibley School of Mechanical and Aerospace Engineering, Cornell Univ., Ithaca, NY 14853-7501
• OSTI ID: 6365096
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 68:3; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
DATA ANALYSIS
DISPERSIONS
EQUATIONS
FLAME PROPAGATION
FLAMES
FLOW RATE
FLUID FLOW
LAMINAR FLOW
MATHEMATICAL MODELS
MIXING
MIXTURES
PIPES
ROUGHNESS
SURFACE AREA
SURFACE PROPERTIES
TURBULENCE