1994 Volume 37 Issue 1 Pages 172-179
We observed the interaction between turbulence and combustion near the lean flammability limit of a premixed flame supported by a hot burnt-gas jet, and elucidated the detailed structure of flames varying with the Damkohler number. A typical wrinkled laminar flame appeared when the equivalence fuel-to-air ratio of the mixture was 0.6, whereas, for an equivalence ratio below the lean flammability limit (e.g., Φm=0.4), a structure which resembled a distributed reaction zone was observed. The latter showed features similar to those of the ordinary distributed reaction zone flame, which was observed in a strongly turbulent shear layer, in many aspects of the observed statistics of fluctuating properties, such as temperature, ion current, and radical chemiluminescence.
JSME international journal. Ser. 1, Solid mechanics, strength of materials
JSME international journal. Ser. A, Mechanics and material engineering
JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry
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JSME International Journal Series A Solid Mechanics and Material Engineering