Stretched laminar flamelet model of turbulent nonpremixed combustion
A model is developed which permits the incorporation of complex hydrocabon chemistry into a detailed flow field prediction for turbulent nonpremixed combustion. The microscopic element in the turbulent ensemble is drawn from a library of stretched laminar flamelets in which the extent of local stretching is characterized by an expression for the turbulent scalar dissipation rate. This quantity is evaluated at the location of the peak temperature. The mean turbulent scalar dissipation rate is used in conjunction with a quenching criterion to partition the several contributions to the mean thermochemical state. Predictions are made for open turbulent methane-air flames with the quenched state modeled as an inert mixing process. The present model contains a mechanism by which O2 penetration of the burning zone into the fuel rich regions may be described. 28 references.
- Research Organization:
- Southampton Univ., England
- OSTI ID:
- 6433960
- Journal Information:
- Combust. Flame; (United States), Journal Name: Combust. Flame; (United States)
- Country of Publication:
- United States
- Language:
- English
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