Model for reaction rates in turbulent reacting flows
To account for the turbulent temperature and species-concentration fluctuations, a model is presented on the effects of chemical reaction rates in computer analyses of turbulent reacting flows. The model results in two parameters which multiply the terms in the reaction-rate equations. For these two parameters, graphs are presented as functions of the mean values and intensity of the turbulent fluctuations of the temperature and species concentrations. These graphs will facilitate incorporation of the model into existing computer programs which describe turbulent reacting flows. When the model was used in a two-dimensional parabolic-flow computer code to predict the behavior of an experimental, supersonic hydrogen jet burning in air, some improvement in agreement with the experimental data was obtained in the far field in the region near the jet centerline. Recommendations are included for further improvement of the model and for additional comparisons with experimental data.
- Research Organization:
- Cooper Union, New York (USA); National Aeronautics and Space Administration, Hampton, VA (USA). Langley Research Center
- OSTI ID:
- 5911520
- Report Number(s):
- NASA-TM-85746; ON: TI85901298
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION KINETICS
FLOW MODELS
FLUID FLOW
KINETICS
MATHEMATICAL MODELS
OXIDATION
REACTION KINETICS
THERMOCHEMICAL PROCESSES
TURBULENT FLOW