Support for Advanced Imaging of Premixed Turbulent Combustion Processes

Abstract

The laser imaging diagnostics of crossed-plane laser tomography (CPLT) and stereo particle image velocimetry (SPIV) have been combined for a systematic study of premixed turbulent combustion in CH4-air, V-burner and swirl-burner flames. Data sets comprised of between 1500 and 2000 realizations have been obtained for 11 different V-flame conditions and 5 different swirl-burner flame conditions. These raw data sets are being analyzed to build a unique database that quantifies mean flame properties (e.g., mean progress variable fields), chemical reaction sheet wrinkling by turbulence (e. g., reaction sheet orientation statistics, curvatures and surface density data) and important velocities (e. g., velocity field of reactants, reaction sheet displacement speeds and gas velocity correlations at the reaction sheet surface). The most significant finding to date is that of negative displacement speeds and a correlation between displacement speed and reaction sheet curvature. These developments are outlined in this report.

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Document Details

Document Type
Technical Report
Publication Date
Nov 04, 2004
Accession Number
ADA429927

Entities

People

  • F. C. Gouldin

Organizations

  • Cornell University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Burning Rate
  • Combustion
  • Curvature
  • Data Analysis
  • Data Sets
  • Displacement
  • Flow
  • Geometric Forms
  • Light Sources
  • Orientation (Direction)
  • Particles
  • Research Facilities
  • Stratified Fluids
  • Three Dimensional
  • Tomography
  • Turbulence
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Computer Vision.
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Directed Energy