Direct numerical simulation of a turbulent nonpremixed "cool" flame

Alex G. Novoselov, Michael E. Mueller

Research output: Contribution to conferencePaper

Abstract

The low-temperature chemistry characteristics of many fuels can couple with molecular transport to result in low-temperature nonpremixed "cool" flames, that is, thin reacting structures governed by low-temperature chemistry rather than high-temperature flame chemistry. Laminar "cool" flames have been studied both experimentally and computationally, but turbulent "cool" flames have not yet been investigated. In this work, an isolated turbulent nonpremixed "cool" flame of n-heptane and oxygen in isotropic turbulence is simulated using Direct Numerical Simulation. The n-heptane chemistry is described with a skeletal mechanism including low-temperature chemistry, which reproduces both the "cool" and "hot" flames when compared to the detailed mechanism. The results of the DNS calculations indicate that the turbulent nonpremixed "cool" flame is well described by the steady flamelet model when subjected to sufficiently slow turbulence.

Original languageEnglish (US)
StatePublished - Jan 1 2017
Event10th U.S. National Combustion Meeting - College Park, United States
Duration: Apr 23 2017Apr 26 2017

Other

Other10th U.S. National Combustion Meeting
CountryUnited States
CityCollege Park
Period4/23/174/26/17

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

Keywords

  • "Cool"
  • DNS
  • Flames
  • Turbulent combustion

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  • Cite this

    Novoselov, A. G., & Mueller, M. E. (2017). Direct numerical simulation of a turbulent nonpremixed "cool" flame. Paper presented at 10th U.S. National Combustion Meeting, College Park, United States.