Flame acceleration and deflagration-to-detonation transition in micro- and macro-channels: An integrated mechanistic study

Wenhu Han, Yang Gao, Chung K. Law

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

The integrated processes of flame acceleration, deflagration-to-detonation transition (DDT), and the resulting detonation propagation in micro- and macro-scale channels are simulated. It is found that the modes of flame acceleration and DDT in these two channels are different, being primarily controlled by viscosity and turbulent flame development, respectively. Furthermore, while boundary layer ignition is crucial for DDT in both channels, viscous wall friction is the key to self-sustained propagation in micro-channels, leading to momentum loss and consequently deficit of the detonation velocity. In macro-channels, the strong overdriven detonation decays and gradually evolves into the Chapman–Jouguet detonation.

Original languageEnglish (US)
Pages (from-to)285-298
Number of pages14
JournalCombustion and Flame
Volume176
DOIs
StatePublished - Feb 1 2017

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Keywords

  • DDT
  • Detonation
  • Micro-/macro-channels

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