Experimental assessment of the sudden-reversal of the oxygen dilution effect on soot production in coflow ethylene flames II: soot radiation and flame transition analysis

Wang, Qianlong; Consalvi, Jean-Louis; Morin, Céline; Legros, Guillaume; Liu, Fengshan; Cai, Weiwei; Liu, Haifeng

doi:10.1016/j.jqsrt.2020.107261

Cited by 5 publications

(2 citation statements)

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“…The trend reversal was attributed to a change in the overall flame structure, specifically the inner premixed reaction zone and the outer diffusion flame. A follow-up study [49] to [45] suggested that the dilution effect of oxygen was a monotonic decrease in soot formation up to a mole fraction of about 40%, but the chemical effect of oxygen displayed a reversal at an oxygen mole fraction of 32%. No explanation was given regarding the kinetic mechanism that causes the reversal.…”

Section: Resultsmentioning

confidence: 99%

“…One school of thought suggests that the reduction of soot is solely dependent on the quantity of oxygen [11], [47]. Experimentation has also shown that in small amounts, diatomic oxygen addition can increase soot production [48], [49]. Additionally, synergistic effects have been seen when mixing oxygenated fuels with hydrocarbon fuels increasing soot production rates [20][21][22].…”

Section: Molecular Oxygen Additionmentioning

confidence: 99%

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Effects Of Additives, Fuel Mixing, And Mechanically Induced Oscillations On Soot Formation

Serwin¹

2023

Preprint

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<p>Soot is a component of particulate matter (PM) as a bi-product of the combustion process of carbon-based fuels. In this thesis a new optical diagnostic technique for temperature measurements is developed. The effects of soot formation as a cause of fuel additives such as oxygen as well as fuel mixtures of ethylene, ethanol, DME and ethane are evaluated experimentally. Additionally, a novel experimental setup, designed to study the effects mechanical oscillations have on soot formation and temperature, is described and presented alongside experimental results for ethylene flames.</p> <p>Three distinct projects were completed as part of this thesis: (i) Various oxygenated flames and the effect of molecular and additive oxygen on soot formation was studied. (ii) A sudden decrease in soot concentration with oxygen addition was observed and this soot reversal effect due molecular oxygen addition was studied. (iii) A novel experimental setup was developed to study mechanically oscillating flame. Soot concentration and temperature were measured for various oscillation amplitudes and frequencies. The findings of this thesis show synergistic effects of soot production with oxygen addition and the effects of oscillations on soot formation.</p>

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Section: Resultsmentioning

confidence: 99%