Soot Morphology in Unsteady Counterflow Diffusion

Abstract

Due to the resulting reduction of efficiency, providing an IR source for tracking and targeting, and its harmful effects on human health, soot emission from diesel engines continues to be of interest to the US Army. The broad focus of this three-year project has been to better understand the soot formation processes occurring in diesel engines though experimentation in simple unsteady counterflow diffusion flames. Specifically, we have developed a planar diagnostic technique to measure the morphology (fractal dimension, primary spherule diameter, number if spherules per aggregate, etc) of soot in a plane using optical techniques, measured soot volume fraction in high pressure jet diffusion flames (up to 30 atmospheres), and measured a range of PAR (three different size classes) in an unsteady counterflow diffusion flame.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2000
Accession Number
ADA421603

Entities

People

  • William L. Roberts

Organizations

  • North Carolina State University

Tags

Communities of Interest

  • Biomedical
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Chemistry
  • Combustion
  • Diameters
  • Diesel Engines
  • Diffusion
  • Engines
  • Flow Rate
  • Fluid Dynamics
  • Geometry
  • High Pressure
  • Laser Beams
  • Laser Induced Fluorescence
  • Lasers
  • Light Scattering
  • Light Sources
  • Predictive Modeling
  • Scattering

Fields of Study

  • Physics

Readers

  • Aerosol Science/Aerosol Physics
  • Fluid Mechanics and Fluid Dynamics.