An investigation of three-dimensional fires in enclosures
A mathematical model has been developed to study the flame and flow structures of steady-state or transient fires in three-dimensional enclosures. The computations provide the flame location, flow patterns and distributions of velocity, temperature and species concentrations in the enclosure. The model considers turbulent flow, and uses a single-step finite-rate irreversible chemical reaction between the fuel and oxidizer. Radiation from the flame and surfaces is computed using a six-flux radiation model. Results are presented for two compartment arrangements as demonstrations of the potential of the method and also as validation comparisons with quasi-steady-state experiments. Notwithstanding the limitations of physical knowledge concerning turbulent combustion, it is found that the simple turbulence flow models used may provide a correct quantitative description of the problems under study. Improved accuracy and detailed computations of the flame structure can be derived from the present approach by including more sophisticated turbulence models, such as, for example, the ''two-fluid'' model.
- Research Organization:
- Cham Ltd., London
- OSTI ID:
- 5340071
- Report Number(s):
- CONF-830702-
- Journal Information:
- HTD (Publ.) (Am. Soc. Mech. Eng.); (United States), Journal Name: HTD (Publ.) (Am. Soc. Mech. Eng.); (United States) Vol. HTD-VOL. 25; ISSN ASMHD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
ACCURACY
BUILDINGS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION KINETICS
FIRES
FLAME PROPAGATION
FLOW MODELS
FLUID FLOW
FUELS
KINETICS
MATHEMATICAL MODELS
OXIDIZERS
RADIATIONS
REACTION KINETICS
STEADY-STATE CONDITIONS
SURFACES
TEMPERATURE DEPENDENCE
THREE-DIMENSIONAL CALCULATIONS
TRANSIENTS
TURBULENT FLOW
TWO-PHASE FLOW
VELOCITY