Effect of Wall Surface Reaction on a DME/air Weak Flame in a Micro Flow Reactor with a Streamwise Temperature Distribution

摘要

Wall chemical effect on DME/air weak flames was investigated using a micro channel with a streamwise temperature gradient. Quartz and SUS321 have been employed as two typical wall surface materials. The streamwise distributions of HCHO and OH in the weak flame were measured by planar laser-induced fluorescence (PLIF). Distributions of DME and CO in the weak flame were also measured with the gas chromatography (GC). It is found that both the low- and high-temperature oxidation in the weak flame has been significantly affected by the wall chemical effect in the SUS321-coated channel.