Influence of heat-loss on compressibility-driven flames propagating from the closed end of a long narrow duct

Vadim N. Kurdyumov, Moshe Matalon

Research output: Contribution to journalArticlepeer-review

Abstract

This study focuses on the dynamics of compressibility-driven flames that emerge in narrow tubes, closed at their ignition end, when conductive heat losses through the walls are appreciable. A narrow gap approximation is used to reduce the governing equations to an effectively one-dimensional problem. In long channels this problem admits traveling-wave solutions which we have investigated numerically for finite values of the Zel'dovich number, and asymptotically in the limit of large Zel'dovich numbers. In particular, we describe the flame structure and the dependence of the propagation speed on the physico-chemical parameters, including the heat loss and compressibility parameters, and examine the transition from compressibility-driven to isobaric flames when systematically reducing the representative Mach number.

Original languageEnglish (US)
Pages (from-to)1-13
Number of pages13
JournalCombustion and Flame
Volume214
DOIs
StatePublished - Apr 2020

Keywords

  • Activation energy asymptotics
  • Compressibility-driven flames
  • Flames in long ducts
  • Heat loss
  • Isobaric flames

ASJC Scopus subject areas

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

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