Investigation of Premixed and Diffusion Flames in PPC and CI Combustion Modes

Yanzhao An, Mohammed Jaasim Mubarak Ali, R. Vallinayagam, S. Vedharaj, Francisco Hernandez Perez, Jaeheon Sim, Junseok Chang, Hong Im, Bengt Johansson

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


The experimental in-cylinder combustion process was compared with the numerical simualtion for naphtha fuel under conventional compression ignition (CI) and partially premixed combustion (PPC) conditions. The start of injection timing (SOI) with the single injection strategy was changed from late of 10 CAD aTDC to early of 40 CAD aTDC. The three-dimensional full cycle engine combustion simulation was performed coupling with gas phase chemical kinetics by the CFD code CONVERGE™. The flame index was used for evaluating the combustion evolution of premixed flame and diffusion flame. The results show that the flame index could be used as an indicator for in-cylinder homogeneity evaluation. Hydroperoxyl shows a similar distribution with the premixed combustion. Formaldehyde could be used as an indicator for low temperature combustion.

Original languageEnglish (US)
JournalSAE Technical Papers
StatePublished - 2018
Event2018 SAE World Congress Experience, WCX 2018 - Detroit, United States
Duration: Apr 10 2018Apr 12 2018

Bibliographical note

Publisher Copyright:
© 2018 SAE International. All Rights Reserved.

ASJC Scopus subject areas

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


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