Accession Number : ADA299782

Title :   Development and Assessment of Turbulence-Chemistry Models in Highly Strained Non-Premixed Flames.

Descriptive Note : Final rept. 1 Oct 91-30 Sep 94,

Corporate Author : GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT SCHENECTADY NY

Personal Author(s) : Correa, Sanjay M.

PDF Url : ADA299782

Report Date : 31 OCT 1994

Pagination or Media Count : 56

Abstract : The goal of this research is a quantitative understanding of turbulence-chemistry interactions as they pertain to combustion in aeropropulsion engines. The two principal classes of accomplishment are: (1) The first-ever stochastic joint velocity-composition pdf simulations of bluff-body stabilized flames, and comparison with Raman data on major species, temperature and mixture fraction (mean and rms quantities of each) in the same burner. Fuels have been CO/H2 mixtures (whose reduced chemistry is modeled with two compositional variables) and methane (five variables). This method of merging pdf transport and CFD codes can be used to combine the pdf model with any of the CFD codes used in design. There is thus a clear path for transitioning the results of the research. Remaining issues included (i) a chemistry scheme for jet fuels (not just CO/H2 and CH4), tested in turbulence and not only in the the laminar context. and (ii) more species and temperature data in the regime of high turbulence intensity, so that the model can be tested in the regime of real engines. (2) The "Partially Stirred Reactor" or PaSR model was developed toward the first two of these goals. The unsteady evolution of a full chemistry scheme is computed in the presence of turbulence of prescribed frequency. jg p.2

Descriptors :   *MODELS, *TURBULENCE, *STRAIN(MECHANICS), *CHEMISTRY, *FLAMES, VELOCITY, FREQUENCY, SIMULATION, TEMPERATURE, QUANTITATIVE ANALYSIS, PATHS, COMPUTATIONAL FLUID DYNAMICS, PROBABILITY DENSITY FUNCTIONS, HYDROGEN, MIXTURES, REDUCTION, VARIABLES, AERONAUTICS, COMBUSTION, FUELS, PROPULSION SYSTEMS, ENGINES, HIGH INTENSITY, CARBON MONOXIDE, METHANE, COMPOSITION(PROPERTY), JET ENGINE FUELS, LAMINAR FLOW, RAMAN SPECTRA, BURNERS.

Subject Categories : Combustion and Ignition
      Inorganic Chemistry
      Physical Chemistry
      Fluid Mechanics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE