An Investigation of the Impact of Combustion Chamber Geometry on Turbulent Burning Speeds in a Thermodynamic Model

Osman Akin Kutlar, Hüseyin Emre Doǧan*, Abdurrahman Demirci, Hikmet Arslan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Combustion is the main parameter that affects efficiency and exhaust gas emissions. Recently, different studies have been carried out to increase the combustion rates due to the increasing use of the alternative fuels and lean mixtures in spark ignition engines. In general, in the absence of systems such as an optical access engine or ionization probes, combustion process evaluation is done based on cylinder pressure. In this study, the effect of different combustion chamber geometries on the turbulent burning speeds was investigated experimentally and theoretically. A three-zone, quasi-dimensional thermodynamic model for a spark ignition engine was constructed. Measured cylinder pressure data were used to establish the transition between the zones of the model and determine turbulent burning speeds. Two different turbulent speeds were calculated in the model, these are flame propagation and consumption speeds. It was seen that combustion chamber geometry significantly affected turbulent burning speeds. In MAN-Ricardo shapes and cylindrical shapes, the turbulent burning speeds decreased after it reached a maximum value in the combustion period. In flat geometry, without any bowl, speed continuously decreased different from other two designs. By means of a quasi-dimensional thermodynamic model, mean values of the turbulent burning and the flame propagation speeds can be calculated without having any optical observation.

Original languageEnglish
Article number062304
JournalJournal of Energy Resources Technology
Volume145
Issue number6
DOIs
Publication statusPublished - 1 Jun 2023

Bibliographical note

Publisher Copyright:
© 2023 by ASME.

Keywords

  • combustion chamber design
  • energy systems analysis
  • flame propagation speed
  • gasoline engine
  • quasi-dimensional model
  • turbulent burning speed

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