Turbulence-chemistry interactions in reacting flows

Conference · Wed Dec 01 04:00:00 EST 1993

OSTI ID:139850

Barlow, R S; Carter, C D ^[1]

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1. Sandia National Laboratories, Livermore, CA (United States)

Interactions between turbulence and chemistry in nonpremixed flames are investigated through multiscalar measurements. Simultaneous point measurements of major species, NO, OH, temperature, and mixture fraction are obtained by combining spontaneous Raman scattering, Rayleigh scattering, and laser-induced fluorescence (LIF). NO and OH fluorescence signals are converted to quantitative concentrations by applying shot-to-shot corrections for local variations of the Boltzmann fraction and collisional quenching rate. These measurements of instantaneous thermochemical states in turbulent flames provide insights into the fundamental nature of turbulence-chemistry interactions. The measurements also constitute a unique data base for evaluation and refinement of turbulent combustion models. Experimental work during the past year has focused on three areas: (1) investigation of the effects of differential molecular diffusion in turbulent combustion: (2) experiments on the effects of Halon CF{sub 3}Br, a fire retardant, on the structure of turbulent flames of CH{sub 4} and CO/H{sub 2}/N{sub 2}; and (3) experiments on NO formation in turbulent hydrogen jet flames.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• OSTI ID: 139850
• Report Number(s): BNL--48923; CONF-9306172--; ON: DE93015758
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
08 HYDROGEN
40 CHEMISTRY
CARBON MONOXIDE
CHEMICAL REACTIONS
COMBUSTION
CORRECTIONS
DIFFUSION
FLAMES
FLUORESCENCE
HYDROGEN
INTERACTIONS
METHANE
NITRIC OXIDE
RAMAN SPECTROSCOPY
RAYLEIGH SCATTERING
TURBULENCE