PDF calculations of piloted turbulent nonpremixed flames of methane

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Combustion and Flame; (USA)

DOI:https://doi.org/10.1016/0010-2180(90)90066-Z· OSTI ID:6545113

Masri, A R ^[1]; Pope, S B ^[2]

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1. Dept. of Mechanical Engineering, Univ. of Sydney, Sydney (AU)
2. Sibley School of Mechanical Aerospace Engineering, Cornell Univ., Ithaca, NY (US)

A velocity-composition joint pdf transport equation has been solved by the Monte Carlo method to calculate the structure of pilot-stabilized turbulent nonpremixed flames of methane. Three components of velocity and a conserved scalar, namely, mixture fraction, {xi} are jointly represented in the pdf. A new model is used for turbulent frequency. Turbulent dissipation and the fluctuating pressure gradient terms are conditionally modeled. Two simple models for thermochemistry are used. In one, density is a piecewise function of {xi}, and in the other, density is obtained from calculations of a laminar counterflow diffusion flame of methane with a stretch rate, a = 100 s{sup {minus}1}. Calculations are compared with the corresponding experimental measurements performed on a number of flames ranging from flames with low mixing rates to ones close to extinction. The velocity, turbulence, and mixing fields are predicted with reasonable accuracy down to {chi}/D{sub j} {approximately} 30.

• OSTI ID: 6545113
• Journal Information: Combustion and Flame; (USA), Journal Name: Combustion and Flame; (USA) Vol. 81:1; ISSN 0010-2180; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
091000 -- Biomass Fuels-- Properties & Composition-- (1990-)
092000 -- Biomass Fuels-- Combustion-- (1990-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKANES
CALCULATION METHODS
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
FLAMES
FLUID FLOW
HYDROCARBONS
KINETICS
LAMINAR FLOW
METHANE
MONTE CARLO METHOD
ORGANIC COMPOUNDS
PRESSURE GRADIENTS
REACTION KINETICS
TURBULENT FLOW
VELOCITY