Role of low-temperature chemistry in detonation of n-heptane/oxygen/diluent mixtures

Wenkai Liang, Rémy Mével, Chung K. Law

Research output: Contribution to conferencePaper

Abstract

Numerical simulation of the ZND detonation structure of mixtures of n-heptane, oxygen and diluent detonations was performed with detailed chemistry. Results show that low-temperature chemistry is activated behind high Mach number shock waves with increasing dilutions of CO2, which leads to non-monotonous thermicity profiles with two stages of energy release, caused by low- and high-temperature chemistries, respectively. For the evolution of the induction length and cell size, although the total length scales do not show negative response with increasing temperature, the length scale of the first-stage ignition demonstrates negative response when the post-shock temperature decreases within the NTC (negative temperature coefficient) regime.

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

  • Detonation cell size
  • Induction length
  • Low temperature chemistry
  • N-heptane

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  • Cite this

    Liang, W., Mével, R., & Law, C. K. (2017). Role of low-temperature chemistry in detonation of n-heptane/oxygen/diluent mixtures. Paper presented at 10th U.S. National Combustion Meeting, College Park, United States.