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Premixed Hydrogen/air Flame in Ceramic Granular Bed

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Aug 2015Publisher:Elsevier BVJournal:Energy Procedia, volume 75, pages 2,033-2,037 (issn: 1876-6102,

Authors: S.I. Yang; S.C. Lin;

doi: 10.1016/j.egypro.2015.07.269

Premixed Hydrogen/air Flame in Ceramic Granular Bed

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Abstract

AbstractThis study investigates the characteristics of a lean premixed hydrogen/air flame in a ceramic granular bed (CGB) by conducting experimental measurements and numerical simulations. The experimental results show that the operating range (equivalence ratio, ϕ = 0.2–0.4) of CGBs for flame propagation is smaller than that of free flame due to the laminar flame speed (SL), reactivity, and firing rate (Γ) of H2. In addition, flame temperature (Tf) increases with increasing Γ, but decreases with increasing ϕ. Furthermore, Sab/SL decreases with increasing uɛ/SL by the fuel characteristic of Hydrogen (H2) and heat recirculation in the CGB. The numerical simulation results show that the flame reaction zone in the CGB (porosity, ɛ = 0.33) is greater than that of free flame (ɛ = 1) because H2 reacts early and changes the flame propagation characteristics.

Related Organizations

Institute of Nuclear Energy Research
Taiwan
National Formosa University
Taiwan
National Formosa University
Taiwan

Keywords

Energy(all), feedback combustion, porous medium, mild combustion, Hydrogen, high-temperature combustion

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