An assumed joint-Beta PDF approach for supersonic turbulent combustion
- North Carolina State University, Raleigh (United States) NASA, Langley Research Center, Hampton, VA (United States)
In a recent experiment, Cheng et al. (1991) used ultraviolet spontaneous vibrational Raman scattering and laser-induced predissociative fluorescence techniques for simultaneous measurements of temperature and concentrations of O2, H2, H2O, OH, and N2 (and their rms) in supersonic turbulent reacting shear layers. Because present computational techniques are not suited for prediction of all of the above measurements, a new approach has been developed and is being used to predict all relevant flow properties and their rms (where appropriate). The approach explores the use of a joint-Beta PDF for concentrations. It was found that the general expression of this PDF was impractical because of decoding problems resulting from determining the various parameters of the PDF. Thus, a special case of this general expression was considered. Calculations using this simplified version of the joint-Beta PDF were not consistent with the available data from the experiment. 9 refs.
- Research Organization:
- National Aeronautics and Space Administration, Hampton, VA (United States). Langley Research Center
- OSTI ID:
- 6905114
- Report Number(s):
- AIAA-Paper--92-3844; CONF-920747--
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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Pyrolysis
& High-Temperature Chemistry
CALCULATION METHODS
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
COMBUSTION PRODUCTS
COMBUSTORS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENGINES
FLUID FLOW
FLUIDS
FLUORESCENCE
GASES
HEAT ENGINES
HYDROGEN
HYDROXYL RADICALS
INTERNAL COMBUSTION ENGINES
KINETICS
LUMINESCENCE
NITROGEN
NONMETALS
OXYGEN
PROBABILITY
QUANTITY RATIO
RADIATIONS
RADICALS
RAMAN SPECTRA
RAMJET ENGINES
REACTION KINETICS
SPECTRA
SUPERSONIC FLOW
TEMPERATURE MEASUREMENT
TURBULENT FLOW
ULTRAVIOLET RADIATION
VAPORS
WATER VAPOR