Numerical and experimental study of ethanol combustion and oxidation in laminar premixed flames and in jet-stirred reactor

Leplat, Nicolas; Dagaut, Philippe; Togbé, Casimir; Vandooren, Jacques

doi:10.1016/j.combustflame.2010.12.008

Cited by 168 publications

(151 citation statements)

References 65 publications

Supporting

Mentioning

135

Contrasting

Unclassified

Order By: Relevance

“…The kinetic mechanisms available in the literature for ethanol [4,13,14,23,24] are primarily based on revisions to the mechanism from Marinov [24]. The mechanism presented in this work is based on the recent publication from Metcalfe et al [25] who presented a C 1 -C 2 submechanism (Aramco Mech 1.3) validated over a large range of experimental conditions for both hydrocarbon and oxygenated species.…”

Section: Kinetic Modelsmentioning

confidence: 99%

“…Several investigations have focused on studying the chemical kinetics of ethanol combustion using laminar flames [1][2][3][4], shock tubes [5][6][7][8][9][10], flow reactors [11][12][13], jet-stirred reactors [14,15] and a RCM [10]. Ethanol autoignition has been studied in shock tubes mostly at high temperatures and at pressures of less than 5 bar [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Autoignition of ethanol in a rapid compression machine

Mittal¹,

Burke²,

Davies³

et al. 2014

Combustion and Flame

156

123

View full text Add to dashboard Cite

Section: Kinetic Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Autoignition of ethanol in a rapid compression machine

Mittal¹,

Burke²,

Davies³

et al. 2014

Combustion and Flame

156

123

View full text Add to dashboard Cite

“…The spectrum peak at 312 [nm] is attributed primarily to the presence of OH with contributions from CH and possibly other unidentified species and is referred to as OH * chemiluminescence. Both OH and CH are radical species involved in the combustion reaction mechanism models for the combustion of hydrocarbon fuels in general and ethanol in particular [28,29]. The presence of either is taken to indicate the occurrence of radical chemistry and conditions conducive to the oxidation of soot as discussed in Section 1.2.…”

Section: Spectrummentioning

confidence: 99%

“…3]. In reaction mechanism models of ethanol [29] and E85 [30] oxidation, OH is involved in the initial decomposition of ethanol. Based on these results the prescence of OH is an indication of oxidation of E85 and conditions conducive to the oxidation of soot.…”

Section: Soot Formation and Oxidationmentioning

confidence: 99%

In cylinder visualization of stratified combustion of E85 and main sources of soot formation

Johansen

Hemdal

2015

Fuel

View full text Add to dashboard Cite

The combustion process and soot formation in spark ignited spray guided stratified combustion of E85 was investigated in a single cylinder optical engine with direct injection of fuel using an outward opening piezo actuated injector. The effect of engine rotation frequency, fuel quantity, injection sequence and ignition timing was studied. Combustion, soot formation and soot oxidation was analysed using cylinder pressure measurements, images recorded using high speed video cameras, the flame emission spectrum and OH * chemiluminescence and soot incandescence imaging. A maximum injection duration was found to exist for direct ignition of the fuel spray. Engine rotation frequency had little effect on the initial and maximum rate of combustion. The maximum rate of combustion decreased with increasing cycle fuel mass when a single injection was used. The rate of combustion and indicated mean effective pressure increased and the combustion variability decreased when the single injection was split into multiple injections in close succession to deliver the same total fuel mass and the last fuel spray was ignited. Ignition of the first fuel spray resulted in a more pronounced change. The absence of soot incandescence during the initial flame propagation suggested flame propagation in a partially mixed fuel and air mixture with stoichiometric to fuel lean regions. A single fuel injection resulted in piston pool fires due to fuel spray impingement on the piston and was the primary source of soot formation. The pool fires persisted until after conditions favourable to oxidation of the soot had ended. Soot formation in the gas phase occurred while favourable soot oxidation conditions existed and was efficiently oxidized. The magnitude of the piston pool fires was reduced using multiple injections. The reduction is attributed to a reduction of the fuel spray penetration length and a smaller effective injection orifice area, resulting in a shorter total duration of fuel spray impingement on the piston crown. Soot formation occurred primarily in the gas phase when the first of two fuel sprays was ignited and persisted due to the second fuel spray entering an existing flame leading to fuel rich combustion.

show abstract

“…E15 drastically reduced acetylene emissions at lower loads unlike other test fuels. Acetylene acts as precursor for C 1 , and C 2 hydrocarbons, which possibly contribute to the formation of acetylene [56]. It is desirable to have lower acetylene emission in the engine exhaust in order to have lower particulate formation because acetylene acts as a precursor for particulate growth [2,57].…”

Section: Unsaturated Hydrocarbon Emissionsmentioning

confidence: 99%