Detailed Studies of Soot Formation in Laminar Diffusion Flames for Application to Modeling Studies

Abstract

An investigation of soot formation in laminar diffusion flames has shown that soot particle surface growth under laminar diffusion flame conditions ceases because of the depletion of hydrocarbon species, in particular acetylene and benzene, and not due soot particle reactivity loss due to thermal aging of the particles. This results has been obtained through direct species concentration measurements under well controlled conditions while the particle reactivity effects were calculated based on premixed flame results along with particle temperature/time information available from earlier laminar diffusion flame studies. Comparisons with a soot formation model which incorporated detailed chemistry effects showed good agreement in terms of predicted and measured species concentration and soot particle field evolution. In addition, a novel technique for measuring soot volume fraction has been developed based on laser-induced incandescence and applied to similar laminar diffusion flame, studies with good success. This technique represents a major development in terms of its ability to make soot volume fraction measurements in unsteady inhomogeneous combusting flows. Soot formation, Soot particles, Diffusion flames.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 07, 1994
Accession Number
ADA278941

Entities

People

  • Robert J. Santoro

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Biomedical
  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Chemical Reaction Properties
  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Combustion
  • Computers
  • Environmental Health
  • Heat Transfer
  • Laser Beams
  • Laser Induced Fluorescence
  • Measurement
  • Mechanical Engineering
  • Oxidation
  • Reaction Mechanisms
  • Turbines
  • Waveplates

Readers

  • Aerosol Science/Aerosol Physics
  • Combustion science or combustion engineering.

Technology Areas

  • Directed Energy