The effect of nitric oxide on premixed flames of CH4, C2H6, C2H4, and C2H2

Williams, Bradley A.; Pasternack, Louise

doi:10.1016/s0010-2180(97)00091-6

Cited by 58 publications

(43 citation statements)

References 20 publications

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“…The reaction mechanism of Drake and Blint (1989) Tables 3 and 4 of the previous research (Williams and Pasternack, 1997). The third mechanism that we evaluated was the original GRIMECH v-2.11, a mechanism developed for the Gas Research Institute.…”

Section: Methodsmentioning

confidence: 99%

“…This mechanism was designated for the methane flames and the rates were varied within narrow parameters. The modified GRIMECH mechanism added the C2-reaction subset of the previous research (Williams and Pasternack, 1997). The above governing equations are solved using a CKEMKIN-based code (Kee et al, 1989) and a Transport-based one (Kee et al, 1994).…”

Section: Methodsmentioning

confidence: 99%

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Thermal and chemical contributions of added H2O and CO2 to major flame structures and NO emission characteristics in H2/N2 laminar diffusion flame

Kim

Park

Keel

2002

Int. J. Energy Res.

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SUMMARYNumerical simulation with detailed chemistry has been carried out to clearly discriminate the thermal and chemical contributions of added diluents (H 2 O and CO 2 ) to major flame structures and NO emission characteristics in H 2 /N 2 counterflow diffusion flame. The pertinence of GRI, Miller-Bowman, and their recent modified mechanisms are estimated for the combined fuel of H 2 , CO 2 , and N 2 . A virtual species X ; which displaces the individual CO 2 and H 2 O in the fuel sides, is introduced to separate chemical effects from thermal effects. In the case of H 2 O addition the chain branching reaction, H+O 2 ! O+OH is considerably augmented in comparison with that in the case of CO 2 addition. It is also seen that there exists a chemically super-adiabatic effect in flame temperature due to the breakdown of H 2 O. The reaction path of CH 2 O ! CH 2 OH ! CH 3 and the C1-branch reactions become predominant due to the breakdown of CO 2 . In NO emission behaviour super-equilibrium effects caused by the surplus chain carrier radicals due to the breakdown of added H 2 O are more superior to the enhanced effects of prompt NO with the breakdown of added CO 2 . Especially, it is noted that thermal NO emission is directly influenced by the chemical super-equilibrium effects of chain carrier radicals in the case of H 2 O addition. As a result the overall NO emission in the case of the addition of H 2 O is higher than that in the case of CO 2 addition.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Thermal and chemical contributions of added H2O and CO2 to major flame structures and NO emission characteristics in H2/N2 laminar diffusion flame

Kim

Park

Keel

2002

Int. J. Energy Res.

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“…CO+OH. The previous result of our research group (Kim et al, 2002) showed through the comparison of the experimental result of Atreya et al (1996) with numerical predictions with several reaction mechanisms that the numerical results with the Miller-Bowman model showed better agreement with experimental results than those with GRI v-2.11 mechanism, and recognized that the Miller-Bowman scheme was less sensitive in the cases of the inclusion of the C 2 -reaction subset (Williams and Pasternack, 1997). Hence this study adopts the original Miller-Bowman reaction mechanism since the supplementation of a C 2 -reaction subset is meaningless considering the present combinations of H 2 -O 2 /CO 2 or H 2 /CO 2 -O 2 .…”

Section: Numerical Strategiesmentioning

confidence: 80%

Chemical effects of CO2 addition to oxidizer and fuel streams on flame structure in H2-O2 counterflow diffusion flames

Park

Hwang

Choi

et al. 2003

Int. J. Energy Res.

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SUMMARYNumerical simulation of CO 2 addition effects to fuel and oxidizer streams on flame structure has been conducted with detailed chemistry in H 2 -O 2 diffusion flames of a counterflow configuration. An artificial species, which displaces added CO 2 in the fuel-and oxidizer-sides and has the same thermochemical, transport, and radiation properties to that of added CO 2 , is introduced to extract pure chemical effects in flame structure. Chemical effects due to thermal dissociation of added CO 2 causes the reduction flame temperature in addition to some thermal effects. The reason why flame temperature due to chemical effects is larger in cases of CO 2 addition to oxidizer stream is well explained though a defined characteristic strain rate. The produced CO is responsible for the reaction, CO 2 +H=CO+OH and takes its origin from chemical effects due to thermal dissociation. It is also found that the behavior of produced CO mole fraction is closely related to added CO 2 mole fraction, maximum H mole fraction and its position, and maximum flame temperature and its position.

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“…The modeling of these reactions is very important to determine the NOx amount emitted during combustion, because these species initiate process of the NOx formation described by the prompt mechanism. Based on the Miller [38], Gri-Mech 3.0 [39] and Linstedt [40] models and analysis presented in [41], we can present the NOx formation as follows:…”

Section: Representation Of Chemical Changes Occurring In the Combustimentioning

confidence: 99%

NOx emission from a two-stroke ship engine. Part 1: Modeling aspect

Kowalski

Tarełko

2009

Applied Thermal Engineering

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The effect of nitric oxide on premixed flames of CH4, C2H6, C2H4, and C2H2

Cited by 58 publications

References 20 publications

Thermal and chemical contributions of added H2O and CO2 to major flame structures and NO emission characteristics in H2/N2 laminar diffusion flame

Thermal and chemical contributions of added H2O and CO2 to major flame structures and NO emission characteristics in H2/N2 laminar diffusion flame

Chemical effects of CO2 addition to oxidizer and fuel streams on flame structure in H2-O2 counterflow diffusion flames

NOx emission from a two-stroke ship engine. Part 1: Modeling aspect

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