Hydrogen–nitrous oxide delay times: Shock tube experimental study and kinetic modelling

Mével, Rémy; Javoy, S.; Lafosse, Fabien; Chaumeix, Nabiha; Dupré, G.; Paillard, C.

doi:10.1016/j.proci.2008.06.171

Cited by 130 publications

(83 citation statements)

References 24 publications

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“…The reaction mechanism was validated against ignition delay times from previous reflected shock wave experiments [20,21,23,24]. Figure 7 shows the experimental results [23,24] and the model predictions for lean mixtures, 99 mol% diluted with Ar, at reflected shock pressures of 300 kPa and 900 kPa.…”

Section: Kinetic Scheme Validationmentioning

confidence: 95%

“…The chemical kinetic model used in the present study consists of 203 reactions and 32 species [24,3]. It was mainly based on the Konnov [40] and Mueller et al [41] mechanisms.…”

Section: Kinetic Modelingmentioning

confidence: 99%

“…Figure 7 shows the experimental results [23,24] and the model predictions for lean mixtures, 99 mol% diluted with Ar, at reflected shock pressures of 300 kPa and 900 kPa. For the whole set of data (230 points), the mean relative error is 29%, which is on the same order as the experimental uncertainty.…”

Section: Kinetic Scheme Validationmentioning

confidence: 99%

“…Previous studies on hydrogen-nitrous oxide mixtures have generated data sets on the ignition delay time [15,16,17,18,19,20,21,22,23,24,25,26], the laminar burning speed [27,28,29,30,31,32,33,34,35], and the minimum ignition energy [36]. Concerning detonation, Zhang et al measured the critical energy for direct initiation [37] and the cell sizes have been measured [38,39] in the frame work of nuclear waste storage risk assessment.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Detonation in hydrogen–nitrous oxide–diluent mixtures: An experimental and numerical study

Mével

Davidenko

Lafosse

et al. 2015

Combustion and Flame

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show abstract

Section: Kinetic Scheme Validationmentioning

confidence: 95%

“…The chemical kinetic model used in the present study consists of 203 reactions and 32 species [24,3]. It was mainly based on the Konnov [40] and Mueller et al [41] mechanisms.…”

Section: Kinetic Modelingmentioning

confidence: 99%

Section: Kinetic Scheme Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Detonation in hydrogen–nitrous oxide–diluent mixtures: An experimental and numerical study

Mével

Davidenko

Lafosse

et al. 2015

Combustion and Flame

View full text Add to dashboard Cite

show abstract

“…To this end, the use of chemical kinetic models has been invaluable, and in recent years there have been quite a few proposed mechanisms concerned with NO x chemistry, and with interactions of nitrogen oxides with hydrocarbons. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] However, as will be discussed, there can be significant disparity between published models in terms of the thermochemical properties of nitrogen-containing species therein.…”

Section: Introductionmentioning

confidence: 99%

Modeling Nitrogen Species as Pollutants: Thermochemical Influences

et al. 2016

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In order to simulate emissions of nitrogen-containing compounds in practical combustion environments, it is necessary to have accurate values for their thermochemical parameters, as well as accurate kinetic values to describe the rates of their formation and decomposition. Significant disparity is observed in the literature for the former, and we therefore present herein high-accuracy ab initio gas-phase thermochemistry for 60 nitrogenous compounds, many of which are important in the formation and consumption chemistry of NO x species. Several quantum-chemical composite methods (CBS-APNO, G3, and G4) were utilised in order to derive enthalpies of formation via the atomisation method. Entropies and heat capacities were calculated from traditional statistical thermodynamics, with oscillators treated as anharmonic based on ro-vibrational property analyses carried out at the B3LYP/cc-pVTZ level of theory. The use of quantum chemical methods, along with the treatments of anharmonicities and hindered rotors, ensures accurate enthalpy of formation, entropy, and heat capacity values across a temperature range of 298.15-3000 K. The implications of these results for atmospheric and combustion modelling are discussed. TOC graphic2

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Kinetic study of ignition process of ammonia/n‐heptane fuel blends under engine conditions

Li,

Liu,

Wang

et al. 2024

Energy Science & Engineering

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Pilot‐ignited ammonia‐fueled engines have drawn more and more attention for low carbon emissions compared to traditional diesel engines. The ignition processes of NH3/NC7H16 mixtures under compression ignition engine‐like conditions are numerically investigated. By comparing the ignition delay times (IDTs) calculated by six ammonia mechanisms with experimental data, the Glarborg mechanism is selected. Then, the Glarborg mechanism and the Zhang detailed n‐heptane mechanism are merged into a new mechanism, which is adopted in the present study. Results show that the negative temperature coefficient behavior of the IDTs is only observed as the ammonia mass fraction is 70%. Only temperature has a significant effect on IDTs at all research conditions, and the effect of ammonia mass fraction is significant when the temperature is lower than 1000 K. However, the effects of equivalence ratio and pressure are small, especially at high temperatures, high equivalence ratios, and high pressures. Interestingly, the IDTs are categorized into three regions by temperature and ammonia mass fraction. The sensitivity analysis indicates that the sensitivity coefficients of most reactions associated with ammonia decrease with a decrease in ammonia mass fraction, whereas only R4210 is sensitive to ammonia mass fraction for n‐heptane‐related reactions. Rates of production and consumption (ROP) analyses indicate that the ammonia mass fraction mainly affects the ROPs of NC7H16, NH3, and NNH at low and medium temperatures, whereas the ammonia mass fraction affects the ROP of H2NO before the temperature of 2000 K. The ROPs of NC7H16, NH3, and NNH significantly increase with increasing temperature, whereas the ROP of H2NO slightly increases with increasing temperature. The increase of temperature in the early and middle stages is mainly contributed by the oxidation of n‐heptane, while the increase of temperature in the middle and late stages is mainly contributed by the oxidation of ammonia.

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Hydrogen–nitrous oxide delay times: Shock tube experimental study and kinetic modelling

Cited by 130 publications

References 24 publications

Detonation in hydrogen–nitrous oxide–diluent mixtures: An experimental and numerical study

Detonation in hydrogen–nitrous oxide–diluent mixtures: An experimental and numerical study

Modeling Nitrogen Species as Pollutants: Thermochemical Influences

Kinetic study of ignition process of ammonia/n‐heptane fuel blends under engine conditions

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