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The Effect of Piston Bowl and Spray Configuration on Diesel Combustion and Emissions

[+] Author Affiliations
Bassem H. Ramadan

Kettering University, Flint, MI

Charles L. Gray, Jr., Fakhri J. Hamady

Environmental Protection Agency, Ann Arbor, MI

Cody Squibb, Harold J. Schock

Michigan State University, East Lansing, MI

Paper No. ICEF2011-60180, pp. 905-919; 15 pages
  • ASME 2011 Internal Combustion Engine Division Fall Technical Conference
  • ASME 2011 Internal Combustion Engine Division Fall Technical Conference
  • Morgantown, West Virginia, USA, October 2–5, 2011
  • ISBN: 978-0-7918-4442-7
  • Copyright © 2011 by ASME


A numerical and experimental study of the effect of piston bowl and spray configuration on diesel combustion and emissions has been conducted. The objective of this study is to gain better understanding of the effect of the piston bowl shape and fuel injector configuration on fuel-air mixing, combustion, and emissions in a diesel engine. Ideally, a uniform fuel-air mixture in the cylinder is desired to prevent the formation of regions containing a rich mixture, where soot is usually formed, and regions of lean mixtures, where nitrogen oxides are formed. Different piston bowl shapes and fuel injectors (number of nozzles, spray angle) have been considered and simulated using computational fluid dynamics and experiments. CFD calculations of fuel mass fraction, and measurements of cylinder pressure and emissions species are included. The results show that computer simulations coupled with experiments provide insight into the interactions between fluid flow, fuel-air mixing, combustion, and emissions.

Copyright © 2011 by ASME



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