Ignition and Oxidation of Lean CO/H2 Fuel Blends in Air

Kalitan, Danielle M.; Mertens, John D.; Crofton, Mark W.; Petersen, Eric L.

doi:10.2514/1.28123

Cited by 60 publications

(49 citation statements)

References 35 publications

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“…Along with reaction 13, which is known to be central to CO oxidation, the extended mechanism includes reactions 15 and 16f , because they are needed for describing stoichiometric and rich flames, with deletion of 15b leading in particular to large overpredictions of burning rates for rich mixtures. On the other hand, reaction 14f, unimportant for flame propagation, was found to be essential for describing autoignition for conditions near the second explosion limit, in agreement with previous studies [7]. For the conditions tested herein, all additional reactions of the San Diego mechanism [2], including CO + O 2 ⇋ CO 2 + O as well as formyl reactions with O, OH, and O 2 , were found to have a negligible effect on the combustion process.…”

Section: The Reduced Chemistrysupporting

confidence: 90%

“…4 with results of recent shock-tube measurements [7] for CO/H 2 -air mixtures with φ = 0.5 and different CO/H 2 ratios representative of typical syngas mixtures. The conditions considered include near-atmospheric and elevated pressure, although no experimental measurements are available at high pressure for the two mixtures with larger H 2 /CO ratio.…”

Section: Validation Of the Reduced Mechanismsupporting

confidence: 58%

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A four-step reduced mechanism for syngas combustion

Boivin

Jiménez

Sánchez

et al. 2011

Combustion and Flame

152

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A four-step reduced chemical-kinetic mechanism for syngas combustion is proposed for use under conditions of interest for gas-turbine operation. The mechanism builds upon our recently published three-step mechanism for H 2 -air combustion (Boivin et al., Proc. Comb. Inst. 33, 2010), which was cate that the reduced description can be applied with reasonable accuracy in numerical studies of gas-turbine syngas combustion.

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Section: The Reduced Chemistrysupporting

confidence: 90%

Section: Validation Of the Reduced Mechanismsupporting

confidence: 58%

A four-step reduced mechanism for syngas combustion

Boivin

Jiménez

Sánchez

et al. 2011

Combustion and Flame

152

View full text Add to dashboard Cite

show abstract

“…Although the model represents well the ignition delay data [38,39], there is some disagreement between the measured and the calculated data: the model tends to overpredict some of the experimental data at temperatures below approximately 950 K (see Figs. 9 and 10).…”

Section: Environmental Impact Of Rocket Emissionsmentioning

confidence: 87%

Kinetic Mechanism For Low Pressure Oxygen / Methane Ignition and Combustion

Slavinskaya

Haidn

2011

49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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It is known that during a launch of a rocket, the interaction of the exhaust gases of rocket engines with the atmosphere causes a local depletion of the ozone layer. In order to study these chemical processes in detail, a chemical reaction mechanism of the methane oxidation appropriate for high-and low-pressure conditions and a chemical reactor network to reproduce operating conditions in rocket engines and in the environment have been developed. An earlier developed detailed chemical kinetic model for the high-pressure CH 4 /O 2 combustion has been improved for the low pressure and low temperature methane combustion and augmented with a submodel for NOx formation. The main model improvements are related to the pressure depending reactions. The model has been validated for operating conditions of 0.02 < p < 100 atm, 300 < T < 1800 K and 0.5 < φ < 3.0. The network of chemical reactors available in CHEMICAL WORKBENCH software has been successfully developed to simulate chemical processes in the convergent divergent rocket nozzle and in the exhaust-jet. Simulations performed have shown that the exhaust gases of a methane/oxygen propelled liquid rocket engine contain high amounts of active radicals, which can in §uence the formation of nitrogen compounds and consume ozone in the atmosphere.

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“…Radical impurities were evaluated as extra 5% uncertainty. Table 1 displays the selected shock tube experiments [25][26][27][28][29] with the uncertainty intervals evaluated with the proposed empirical rule.…”

Section: Ignition-delay-time Qoimentioning

confidence: 99%

Consistent Chemical Mechanism from Collaborative Data Processing

Slavinskaya¹,

Starcke²,

Abbasi³

et al. 2016

Proceedings of the World Congress on Momentum, Heat and Mass Transfer

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-Numerical tool of Process Informatics Model (PrIMe) is mathematically rigorous and numerically efficient approach for analysis and optimization of chemical systems. It handles heterogeneous data and is scalable to a large number of parameters. The Boundto-Bound Data Collaboration module of the automated data-centric infrastructure of PrIMe was used for the systematic uncertainty and data consistency analyses of the H2/CO reaction model (73/17) and 94 experimental targets (ignition delay times). The empirical rule for evaluation of the shock tube experimental data is proposed. The initial results demonstrate clear benefits of the PrIMe methods for an evaluation of the kinetic data quality and data consistency and for developing predictive kinetic models.

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Ignition and Oxidation of Lean CO/H2 Fuel Blends in Air

Cited by 60 publications

References 35 publications

A four-step reduced mechanism for syngas combustion

A four-step reduced mechanism for syngas combustion

Kinetic Mechanism For Low Pressure Oxygen / Methane Ignition and Combustion

Consistent Chemical Mechanism from Collaborative Data Processing

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