Effects of emulsified fuels on soot evolution in an optically-accessible di diesel engine

Ki Hoon Song, Youngjoo Lee, Thomas Litzinger

Research output: Contribution to conferencePaperpeer-review

29 Scopus citations


Diesel/water emulsions with 1, 2, 5, 10, and 20% water were studied in an optically-accessible direct injection (DI) diesel engine to identify the changes that occur in the spray and combustion processes, as well as soot production during combustion. For each fuel, pressure traces were recorded and analyzed to obtain information on ignition delay and the rate of energy release. In addition to the heat release analysis, direct photography of the combustion event was obtained using a CCD camera to observe the development of the sprays and the flame patterns. Laser light extinction was applied to investigate the evolution of soot during combustion. The heat release results for the emulsions show an increase in the ignition delay time and premixed burn fraction with increasing water content. The spray images showed no major changes with increasing water content; however, the flame images indicated that a significant reduction in the amount of soot occurred as water content increased. The laser light extinction measurement provided quantitative evidence of the soot reduction indicating reductions up to nearly 50% at 20% water.

Original languageEnglish (US)
StatePublished - Dec 1 2000
EventInternational Fall Fuels and Lubricants Meeting and Exposition - Baltimore, MD, United States
Duration: Oct 16 2000Oct 19 2000


OtherInternational Fall Fuels and Lubricants Meeting and Exposition
Country/TerritoryUnited States
CityBaltimore, MD

All Science Journal Classification (ASJC) codes

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


Dive into the research topics of 'Effects of emulsified fuels on soot evolution in an optically-accessible di diesel engine'. Together they form a unique fingerprint.

Cite this