EFFECTS OF RADIATION REABSORPTION DURING FLAME PROPAGATION OF SYNGAS/CO2 MIXTURES

An Xiuli; Liu Hao; He Yuzhen; Zheng Shu; Lu Qiang

doi:10.19912/j.0254-0096.tynxb.2022-1744

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (3) : 277-281. DOI: 10.19912/j.0254-0096.tynxb.2022-1744

EFFECTS OF RADIATION REABSORPTION DURING FLAME PROPAGATION OF SYNGAS/CO₂ MIXTURES

An Xiuli, Liu Hao, He Yuzhen, Zheng Shu, Lu Qiang

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Abstract

Aiming at the effect of CO₂ mixing in the preparation and application of syngas fuel from biomass, numerical simulations are conducted in syngas/air/CO₂ flame, the effect of radiation reabsorption on laminar flame speed is studied by different radiation models. Results show that the radiation reabsorption increase the flame speed of syngas/air/CO₂ mixtures, the relative increment is up to 11.15%. With the increase of equivalence ratio, the increase of flame speed induced by radiation reabsorption effect decrease from 11.15% to 3.12%, which is controlled by the preheat-induced chemical effect. H radicals play the dominant role in the fuel-lean conditions, and the radiation reabsorption effect affects the flame speed through the reaction H+O₂==O+OH, while at the fuel-rich conditions, the reaction H+OH+M==H₂O+M related to OH radicals is the dominant reaction.

Key words

syngas / H₂/CO / radiation / carbon dioxide / flame speed

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An Xiuli, Liu Hao, He Yuzhen, Zheng Shu, Lu Qiang. EFFECTS OF RADIATION REABSORPTION DURING FLAME PROPAGATION OF SYNGAS/CO₂ MIXTURES[J]. Acta Energiae Solaris Sinica. 2024, 45(3): 277-281 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1744

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