Accession Number : ADA186276

Title :   Carbon Monoxide and Turbulence-Chemistry Interactions: Blowoff and Extinction of Turbulent Diffusion Flames.

Descriptive Note : Annual rept. 1 Jun 86-1 May 87,

Corporate Author : GENERAL ELECTRIC CO SCHENECTADY N Y RESEARCH AND DEVELOPMENT CENTER

Personal Author(s) : Correa, S M ; Gulati, A

PDF Url : ADA186276

Report Date : 31 May 1987

Pagination or Media Count : 77

Abstract : The goal of this program is to understand turbulence chemistry interactions in combustion up to and including localized extinction. Experimentally, pilot stabilized non premixed turbulent jet flames of selected mixtures are being studied under conditions conducive to strain-induced local extinction. Laser based techniques such as Raman scattering and Rayleigh scattering are employed. Analytically, models based on the asymptotically thin flamelet concept and on distributed reaction zone concepts are being assessed. A significant finding is that the popular contemporary view of a turbulent flame as an ensemble of asymptotically thin flamelets seems incorrect. Alternative mechanisms based on thick flamelets are proposed. The results include: (1) A complete re evaluation of Raman data showing significant corrections due to high temperature effects. Keywords: Turbulence chemistry interactions, Extinction, Blowoff, turbulent diffusion flames, Superequilibrium, Laser diagnostics.

Descriptors :   *CARBON MONOXIDE, *TURBULENCE, BLOWOFF, COMBUSTION, DIAGNOSIS(GENERAL), DIFFUSION, DISTRIBUTION, EXTINCTION, HIGH TEMPERATURE, LASERS, LIGHT SCATTERING, RAYLEIGH SCATTERING, ASYMPTOTIC NORMALITY, MONTE CARLO METHOD, HYDROGEN, NITROGEN, REACTION KINETICS, FUELS, RAMAN SPECTROSCOPY

Subject Categories : Physical Chemistry
      Combustion and Ignition
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE