Effect of Geometric Scale on Heat Recirculation and Syngas Production in a Noncatalytic Counter-Flow Reformer

in Wiley Online Library (wileyonlinelibrary.com)Heat recirculation through the combustor walls is responsible in sustaining flames in microcombustors. Incorporating porous medium into microcombustors helps further enhance heat recirculation via the solid matrix. However, the problem of anisotropy arises when the pore size is comparable to the characteristic length of microcombustors. To quantitatively address the problem, an experimental study on the flame stability limits of premixed H 2 /air in a planar microcombustor partially filled with porous medium is undertaken. Three folding schemes, namely, parallel sheets, streamwise flow passage, and streamwise flow blocking, are employed to realize the anisotropic properties. By varying the width (W) and position (L out ) of the porous medium, the effects of folding schemes on the critical flashback (A 2 ), and breaking-through (A 3 ) conditions are examined. The experimental results indicate that the disturbance to flow velocity in the transverse direction mainly influences A 2 , while A 3 is greatly affected by the blocking normal to the flow direction.

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Effect of heat recirculation on the combustion stability of methane-air mixtures in catalytic micro-combustors

Chen

Liu

Song

et al. 2017

Applied Thermal Engineering

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Effect of Geometric Scale on Heat Recirculation and Syngas Production in a Noncatalytic Counter-Flow Reformer

Cited by 11 publications

References 36 publications

Analysis of an idealized counter-current microchannel-based reactor to produce hydrogen-rich syngas from methanol

Analysis of an idealized counter-current microchannel-based reactor to produce hydrogen-rich syngas from methanol

Flame stabilization in a planar microcombustor partially filled with anisotropic porous medium

Effect of heat recirculation on the combustion stability of methane-air mixtures in catalytic micro-combustors

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