A numerical study of transient ignition in a counterflow nonpremixed methane-air flame using adaptive time integration

Hong Im*, Laxminarayan L. Raja, Robert J. Kee, Linda R. Petzold

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

This paper presents a computational algorithm to redict highly-transient flame behavior in counterflow situations. The first objective of the paper is to extend the transient counterflow problem to incorporate some gasdynamic compressibility effects, yet retain the desirable similarity structure. By relaxing assumptions in earlier formulations,the computational algorithms can deliver high accuracy even in periods of extremely rapid transients, like combustion ignition. The algorithms are demon-strated on two combustion-ignition problems for methane-air, counterflow, nonpremixed flames. The first concerns the ignition transient in a steady strain field. The second concerns the effects of a high-frequency oscillatory strain field on the ignition process. The results reveal that, when the mean strain rate is near the steady ignition limit, the ignition process is highly sensitive to the details of the strain-rate fluctuations.

Original languageEnglish (US)
Pages (from-to)341-363
Number of pages23
JournalCombustion science and technology
Volume158
DOIs
StatePublished - Jan 1 2000

Keywords

  • Adaptive Time Integration
  • DAE System
  • Ignition

ASJC Scopus subject areas

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

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