Turbulent boundary-layer diffusion flame - Effects of probability density function
- National Chiao Tung Univ., Hsinchu (China) Chung Shan Institute of Science and Technology, Lungtan (China)
A turbulent diffusion flame adjacent to a solid fuel in a parallel airflow is studied analytically. The flow is assumed to be of boundary-layer type where the mean properties of flowfield are predicted by a low-Reynolds-number K-epsilon two-equation model. The chemical reaction is approximated as one-step and infinite-fast. The mean mass-fraction distribution in the boundary layer is described by a pdf. Four kinds of pdf are used: beta, clipped Gaussian, double delta, and ten-point delta, respectively. The general features of each flame structure obtained by applying the corresponding pdf are quite similar. The velocity, mixture fraction and temperature profiles appear nearly identical by the uses of beta and clipped Gaussian pdf. 25 refs.
- OSTI ID:
- 5661768
- Journal Information:
- AIAA Journal (American Institute of Aeronautics and Astronautics); (USA), Vol. 29; ISSN 0001-1452
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
SOLID FUELS
FLAME PROPAGATION
AIR FLOW
ANALYTICAL SOLUTION
BOUNDARY LAYERS
COMBUSTION KINETICS
COMBUSTION PROPERTIES
DIFFUSION
FLAMES
MATHEMATICAL MODELS
REYNOLDS NUMBER
TURBULENT FLOW
CHEMICAL REACTION KINETICS
FLUID FLOW
FUELS
GAS FLOW
KINETICS
LAYERS
REACTION KINETICS
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry