Effect of compressibility on laminar flame speed and its stabilizing effect on Darrieus-Landau instability of a premixed flame front

Keigo Wada, Yasuhide Fukumoto

Research output: Contribution to conferencePaper

Abstract

The compressibility effect on a premixed flame front is investigated for small Mach numbers Ma in terms of M2 expansions. We extend the method of matched asymptotic expansions to O(Ma2) in which a flame front consists of he reaction and the preheat zones, By an asymptotic analysis of the reaction zone, we establish a rapid decrease of the laminar flame speed S-L with Ma and a volumetric heat loss, of compressibility origin, brought by the pressure variation in the heat-conduction equation, which has been gone neglected in the zero-Mach-number limit. Together with O(Ma2) effect, this dramatic decrease in S-L brings in stabilization of the Darrieus-Landau instability, the linear instability of a plane flame front.

Original languageEnglish
Publication statusPublished - Jan 1 2019
Event12th Asia-Pacific Conference on Combustion, ASPACC 2019 - Fukuoka, Japan
Duration: Jul 1 2019Jul 5 2019

Conference

Conference12th Asia-Pacific Conference on Combustion, ASPACC 2019
CountryJapan
CityFukuoka
Period7/1/197/5/19

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Condensed Matter Physics

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    Wada, K., & Fukumoto, Y. (2019). Effect of compressibility on laminar flame speed and its stabilizing effect on Darrieus-Landau instability of a premixed flame front. Paper presented at 12th Asia-Pacific Conference on Combustion, ASPACC 2019, Fukuoka, Japan.