Numerical Study on the Premixed Flame Instability and Nonlinear Behavior
예혼합화염의 불안정성 및 비선형적 거동에 관한 수치적 연구
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Kang, Sang-Hun
;
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Baek, Seung-Wook
;
- Im, Hong G. (Dept. of Mech. Eng., Univ. of Mich.)
- Published : 2005.10.06
Abstract
To understand fundamental characteristics of combustion in a small scale device, the effects of the momentum and heat loss on the stability of laminar premixed flames in a narrow channel are investigated by two-dimensional high-fidelity numerical simulation. A general finding is that momentum loss promotes the Saffman-Taylor (S-T) instability which is additive to the Darrieus-Landau (D-L) instabilities, while the heat loss effects result in an enhancement of the diffusive-thermal (D-T) instability. These effects are also valid in nonlinear behavior of the premixed flame. The simulations of multiple cell interactions are also conducted with heat and momentum loss effects.