Dynamics of cool flames

Yiguang Ju, Christopher B. Reuter, Omar R. Yehia, Tanvir I. Farouk, Sang Hee Won

Research output: Contribution to journalReview article

12 Scopus citations

Abstract

Cool flames play a critical role in ignition timing, burning rate, burning limits, engine knocking, and emissions in conventional and advanced combustion engines. This paper provides an overview of the recent progress in experimental and computational studies of cool flames. First, a brief review of low-temperature chemistry and classical studies of cool flames is presented. Next, the recent experimental and computational findings of cool flames in microchannels, microgravity droplet combustion, counterflow flames, and turbulent combustion environments are reviewed. The flammability diagrams of different low-temperature flames and their relations to hot flames in premixed and nonpremixed systems are discussed. The impact of cool flames on turbulent combustion and knock formation is also highlighted. Finally, future avenues in cool flame research, including the use of cool flames as a new platform for low-temperature kinetic model validation, are presented. It is concluded that the understanding and control of low-temperature combustion is critical for the development of future advanced engines and new fuels.

Original languageEnglish (US)
Article number100787
JournalProgress in Energy and Combustion Science
Volume75
DOIs
StatePublished - Nov 2019

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

Keywords

  • Cool flame
  • Flame dynamics
  • Low-temperature chemistry

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  • Cite this

    Ju, Y., Reuter, C. B., Yehia, O. R., Farouk, T. I., & Won, S. H. (2019). Dynamics of cool flames. Progress in Energy and Combustion Science, 75, [100787]. https://doi.org/10.1016/j.pecs.2019.100787