A study of NO and soot evolution in a di diesel engine via planar imaging

Bülent Alataş, John A. Pinson, Thomas Litzinger, Domenic A. Santavicca

Research output: Contribution to conferencePaperpeer-review

26 Scopus citations


An experimental study has been conducted to characterize NO and soot evolution in an optically-accessible D.I. diesel engine with a square combustion chamber. Two-dimensional laser-induced fluorescence was used to characterize NO evolution. Soot evolution was characterized by two-dimensional laser-induced incandescence (LII) and Mie scattering techniques as well as direct photography of the flame luminosity. The engine operating parameters were set to provide optimum conditions for NO imaging. Attenuation of the UV beam proved to be the major obstacle in obtaining NO images. Therefore, oxygen was added to the intake air charge in order to reduce the optical density of the combustion medium. The NO images showed that the NO formation started almost immediately after ignition and ceased no later than 40 degrees ATDC. No soot images could be obtained by the laser-induced incandescence or Mie scattering methods before 20 degrees ATDC since the soot concentration was very low.

Original languageEnglish (US)
StatePublished - Dec 1 1993
EventInternational Congress and Exposition - Dearborn, MI, United States
Duration: Mar 1 1993Mar 5 1993


OtherInternational Congress and Exposition
Country/TerritoryUnited States
CityDearborn, MI

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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