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

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.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1987
Accession Number
ADA186276

Entities

People

  • A. Gulati
  • S. M. Correa

Organizations

  • General Electric

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Carbon Monoxide
  • Chemical Kinetics
  • Chemical Reaction Properties
  • Chemistry
  • Combustion
  • Dielectric Gases
  • Energy
  • Flow
  • Fluid Flow
  • High Temperature
  • Hypervelocity Flow
  • Kinetics
  • Measurement
  • Rayleigh Scattering
  • Scattering
  • Turbulent Diffusion
  • Turbulent Mixing

Readers

  • Combustion science or combustion engineering.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Systems Analysis and Design

Technology Areas

  • Directed Energy