Measured Properties of Turbulent Premixed Flames for Model Assessment, Including Burning Velocities, Stretch Rates, and Surface Densities (Postprint)

Abstract

One goal of this work was to quantify several properties of turbulent premixed flames that have not been quantified before and are especially useful for the assessment of direct numerical simulations (DNS) and models. It was decided to select a flame that is in the corrugated flamelet regime and use simultaneous CH planar laser-induced fluorescence/ particle image velocimetry (CH PLIF/PIV) diagnostics, which previously had been applied only to nonpremixed combustion. These diagnostics allow one to identify the thin wrinkled reaction zone (where CH exists) and the nearby velocity field. Properties that were measured include local stretch rates, a wrinkling parameter, the degree of flamelet extinction, reaction layer thicknesses, flame surface density ( ), and global consumption speed, which is one type of turbulent burning velocity that is described below.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2006
Accession Number
ADA464297

Entities

People

  • Campbell D. Carter
  • James F. Driscoll
  • Jeffrey M. Donbar
  • Sergei A. Filatyev

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Boundaries
  • Chemical Reactions
  • Combustion
  • Efficiency
  • Flow
  • Geometry
  • Laser Induced Fluorescence
  • Lasers
  • Measurement
  • Simulations
  • Temperature Gradients
  • Thickness
  • Turbulence
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Computational Modeling and Simulation
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Directed Energy