Measurement of atomic oxygen and nitrogen oxides in jet-stirred combustion

Malte, Philip C.; Pratt, David T.

doi:10.1016/s0082-0784(75)80371-7

Cited by 114 publications

(58 citation statements)

References 9 publications

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“…Note that the oxidation of nitrous oxide appears to be an important early source of nitric oxide in all three calculations ($ = 0.8, 1.0, and 1.2), but it is not clear whether this is a significant conclusion. It is marginally consistent with the observation that nitrous oxide is an important source of nitric oxide in fuel-lean systems at low temperatures (31), but at variance with the observation that "prompt NO" does not occur in hydrogen nor carbon-monoxide flames (34); the rate constant used for reaction xxc agrees with that most recently recommended (29), but no "sensitivity tests" were carried out on this reaction. itself using jet fuel at the same inlet temperature (37).…”

Section: Speciessupporting

confidence: 87%

“…3). The although its inclusion in model reaction schemes 1s now commonplace (7,8,30,31), and the reaction scheme [6]- [8] is now often termed the extended Zeldovich mechanisriz (32). Moreover, we have assumed for reaction 7 the roorntemperature rate constant with no activation energy, so its importance could well be underestimated in these calculation^.^ We may rationalise the results shown in Fig.…”

Section: Speciesmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of a proposal for nitric-oxide abatement in jet-aircraft engines

Craig¹,

Pritchard²

1977

Can. J. Chem.

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Modifications are reported to a conventional gas-kinetics computer program which allow for the continuous addition of chemical species to the flowing gas. This is necessary in modelling the gas flows in a jet engine where air is continuously entrained with the burnt or burning gases, and it also facilitates the investigation of introducing chemical additives into a flowing reaction mixture.The program is used to compare, under the same one-dimensional modelling approximations, the nitric-oxide emissions from a conventional jet engine and from a proposed lean-burning modification, and it is concluded that the lean-burning model has potential for reducing nitric-oxide emission by more than two orders of magnitude.

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Section: Speciessupporting

confidence: 87%

Section: Speciesmentioning

confidence: 99%

Analysis of a proposal for nitric-oxide abatement in jet-aircraft engines

Craig¹,

Pritchard²

1977

Can. J. Chem.

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“…The NOx analysis in the spatial domain is performed by post-processing the previously computed reactive flow solution. Copyright © 2013 by ASME agreement with the Zeldovich mechanism of thermal NO formation [12,13]. Figure 3(c) shows the part of the reactive flow-field where the temperature is the highest (>2100K) which correlates to the high thermal NO concentration zone in Figure 3(d).…”

Section: Combustor Spatial Flow-fieldsupporting

confidence: 59%

Efficient Strategy for Low NOx Combustor Design in the Spatial Domain Using Multi-Fidelity Solutions

Wankhede

Bressloff

Keane

2013

Volume 1A: Combustion, Fuels and Emissions

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Gas turbine combustor designers now routinely use highfidelity reactive computational fluid dynamics (CFD) analyses to gain valuable insight into the complex reactive flow-field and pollutant formation process. But, a large number of such computationally expensive CFD analyses are generally required to arrive at an acceptable combustor configuration. Therefore, given the practical limits on available computational resources and time, traditional combustor design methodologies using only high-fidelity CFD analyses need further improvement. To address this, a combustor design strategy using multifidelity coKriging response surface model (RSM) is developed and applied for the design of a two-dimensional test combustor problem in the spatial domain using steady-state Reynoldsaveraged Navier Stokes (RANS) formulation. The design and optimization problem is set-up for two geometric variables and a single-objective, NOx concentration, as it is of current interest to the combustor design community. The developed multifidelity strategy is also assessed for performance against highfidelity Kriging RSM strategy. This study demonstrates that the multi-fidelity design strategy can obtain good designs with up to ten times less effort than a full grid sampling search plan. However, the multi-fidelity co-Kriging strategy does not outperform the high-fidelity Kriging strategy for the given spatial domain problem.

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“…Prompt NO (or Fenimore NO) formation is initiated by attack of CH i -radicals on N 2 forming cyanide species, which may subsequently be oxidized to NO [1]. Additional reaction paths to NO from atmospheric nitrogen are initiated by recombination of N 2 with atomic oxygen, O + N 2 (+M) = N 2 O (+M) [114], or atomic hydrogen, H + N 2 (+M) = NNH(+M) [24], followed by oxidation of the nitrogen intermediate to NO.…”

Section: The Nnh Mechanism Of No Formationmentioning

confidence: 99%

“…Malte and co-workers [114,116] have conducted a range of jet-stirred reactor experiments to characterize NO formation in lean premixed combustion. While NO is mostly formed via N 2 O under these conditions, Haworth et al [32] identified the CO/H 2 oxidation data of Steele et al [116] as being sensitive to NO formation from the NNH mechanism.…”

Section: The Nnh Mechanism Of No Formationmentioning

confidence: 99%

The role of NNH in NO formation and control

Klippenstein

Harding

Glarborg³

et al. 2011

Combustion and Flame

337

268

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One of the remaining issues in our understanding of nitrogen chemistry in combustion is the chemistry of NNH. This species is known as a key intermediate in Thermal DeNO x , where NH 3 is used as a reducing agent for selective non-catalytic reduction of NO. In addition, NNH has been proposed to facilitate formation of NO from thermal fixation of molecular nitrogen through the socalled NNH mechanism. The importance of NNH for formation and reduction of NO depends on its thermal stability and its major consumption channels. In the present work, we study reactions on the NNH + O, NNH + O 2 , and NH 2 + O 2 potential energy surfaces using methods previously developed by Miller, Klippenstein, Harding, and their co-workers. Their impact on Thermal DeNO x and the NNH mechanism for NO formation is investigated in detail.

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Measurement of atomic oxygen and nitrogen oxides in jet-stirred combustion

Cited by 114 publications

References 9 publications

Analysis of a proposal for nitric-oxide abatement in jet-aircraft engines

Analysis of a proposal for nitric-oxide abatement in jet-aircraft engines

Efficient Strategy for Low NOx Combustor Design in the Spatial Domain Using Multi-Fidelity Solutions

The role of NNH in NO formation and control

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