He와 Ar으로 희석된 합성가스 화염에서 루이스 수와 선호확산효과
Effects of Lewis Number and Preferential Diffusion in Syngas Flame Diluted with He and Ar
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Numerical study is conducted to grasp flame characteristics in H2/CO syngas counterflow diffusion flamesdiluted with He and Ar. An effective fuel Lewis number, applicable to premixed burning regime and evento moderately-stretched diffusion flames, is suggested through the comparison among fuel Lewis number,effective Lewis number, and effective fuel Lewis number. Flame characteristics with and without thesuppression of the diffusivities of H, H2, and He are compared in order to clarify the important role ofpreferential diffusion effects through them. It is found that the scarcity of H and He in reaction zoneincreases flame temperature whereas that of H2 deteriorates flame temperature. Impact of preferential diffusionof H, H2, and He in flame characteristics is also addressed to reaction pathways for the purpose of displayingchemical effects.
Abstract
Numerical study is conducted to grasp flame characteristics in H2/CO syngas counterflow diffusion flamesdiluted with He and Ar. An effective fuel Lewis number, applicable to premixed burning regime and evento moderately-stretched diffusion flames, is suggested through the comparison among fuel Lewis number,effective Lewis number, and effective fuel Lewis number. Flame characteristics with and without thesuppression of the diffusivities of H, H2, and He are compared in order to clarify the important role ofpreferential diffusion effects through them. It is found that the scarcity of H and He in reaction zoneincreases flame temperature whereas that of H2 deteriorates flame temperature. Impact of preferential diffusionof H, H2, and He in flame characteristics is also addressed to reaction pathways for the purpose of displayingchemical effects.
참고문헌 (28)
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