A skewed PDF combustion model for jet diffusion flames. [Probability density function (PDF)]

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910471· OSTI ID:5430583

Abou-Ellail, M M.M.; Salem, H ^[1]

---

1. Cairo Univ. (Egypt)

A combustion model based on restricted chemical equilibrium is described. A transport equation for the skewness of the mixture fraction is derived. It contains two adjustable constants. The computed values of the mean mixture fraction (f) and its variance and skewness (g and s) for a jet diffusion methane flame are used to obtain the shape of a shewed pdf. The skewed pdf is split into a turbulent part (beta function) and a nonturbulent part (delta function) at f = 0. The contribution of each part is directly related to the values of f, g, and s. The inclusion of intermittency in the skewed pdf appreciably improves the numerical predictions obtained for a turbulent jet diffusion methane flame for which experimental data are available.

• OSTI ID: 5430583
• Journal Information: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 112:4; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKANES
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DENSITY
FLAMES
FLOW MODELS
FLUID FLOW
HYDROCARBONS
KINETICS
LAMINAR FLOW
MATHEMATICAL MODELS
METHANE
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
PROBABILISTIC ESTIMATION
REACTION KINETICS
TURBULENT FLOW