Characterization of Horizontally-Issuing Reacting Buoyant Jets

Abstract

This research studied the mixing and combustion behavior of low Reynolds number, horizontally-issuing gaseous fuel jets with ambient air. The study focused on the mixing characteristics of propane and ethylene. These fuels are, respectively, heavy and neutral with respect to air, and were tested at various Froude numbers and laminar tube Reynolds numbers. Using low Froude and Reynolds number flows allowed for isolation of the buoyant jet effects. The process was characterized through the use of a non-invasive, OH Planar Laser-Induced Fluorescence (PLIF) technique, and supplemented with filtered (CH*) and unfiltered high speed imaging. The resulting cross sectional PLIF images were used to produce a three-dimensional mapping of the jet spreading, jet path, and combustion progress through OH concentrations up to x/D = 9, for both fuels. Combustion locations were further visualized and confirmed through CH* high speed imaging.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2011
Accession Number
ADA540182

Entities

People

  • Joshua J. Heffernen

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Chemical Reactions
  • Combustion
  • Computational Fluid Dynamics
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Froude Number
  • Gas Turbines
  • Heat Transfer
  • Hybrid Power
  • Laser Induced Fluorescence
  • Lasers
  • Mechanics
  • Reynolds Number
  • Three Dimensional
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Combustion science or combustion engineering.
  • Marine Hydrodynamics

Technology Areas

  • Directed Energy