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.
|出版ステータス||出版済み - 2019|
|イベント||12th Asia-Pacific Conference on Combustion, ASPACC 2019 - Fukuoka, 日本|
継続期間: 7 1 2019 → 7 5 2019
|会議||12th Asia-Pacific Conference on Combustion, ASPACC 2019|
|Period||7/1/19 → 7/5/19|
All Science Journal Classification (ASJC) codes