Significance of the HO2+ CO reaction during the combustion of CO + H2 mixtures at high pressures

Mittal, Gaurav; Sung, Chih-Jen; Fairweather, Michael; Tomlin, Alison S.; Griffiths, J. F.; Hughes, Kevin J.

doi:10.1016/j.proci.2006.07.068

Cited by 60 publications

(61 citation statements)

References 24 publications

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“…The calculations are performed using a zero-dimensional model that and incorporates an adiabatic assumption. RCM modeling treatment is further described in [18,23].…”

Section: Rapid Compression Machine Simulationmentioning

confidence: 99%

“…It was observed that the non-linearity of the calibrating curves is different for each gas, therefore conventional calibration by air and employment of calibrating coefficients could lead to additional uncertainties and should be discouraged. A detailed analysis and quantification of burning velocity uncertainties was presented elsewhere [23,24], and the overall accuracy of the burning velocity measurements was estimated to be better than ±1 cm/s (double standard deviation with 95% confidence level); the same uncertainty level was adopted for the present experiments. The relative error of the equivalence ratio φ was evaluated to be ±0.6%.…”

Section: Vub Flamesmentioning

confidence: 99%

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An experimental and modeling study of propene oxidation. Part 2: Ignition delay time and flame speed measurements

Burke

Donagh

et al. 2015

Combustion and Flame

286

208

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Experimental data obtained in this study (Part II) complement the speciation data presented in Part I, but also offer a basis for extensive facility cross-comparisons for both experimental ignition delay time (IDT) and laminar flame speed (LFS) observables.To improve understanding of the ignition characteristics of propene, a series IDT experiments were performed in six different shock tubes and two rapid compression machines (RCMs) under conditions not previously studied. This study is the first of its kind to directly compare ignition in several different shock tubes over a wide range of conditions. For common nominal reaction conditions among these facilities, cross-comparison of shock tube IDTs suggests 20-30% reproducibility (2σ) for the IDT observable. The combination of shock tube and RCM data greatly expands the data available for validation of propene oxidation models to higher pressures (2-40 atm) and lower temperatures (750-1750 K).Propene flames were studied at pressures from 1-20 atm and unburned gas temperatures of 295-398 K for a range of equivalence ratios and dilutions in different facilities. The present propene-air LFS results at 1 atm were also compared to LFS measurements from the literature. With respect to initial reaction conditions, the present experimental LFS cross-comparison is not as comprehensive as the IDT comparison; however, it still suggests reproducibility limits for the LFS observable. For the LFS results, there was agreement between certain data sets and for certain equivalence ratios (mostly in the lean region), but the remaining discrepancies highlight the need to reduce uncertainties in laminar flame speed experiments amongst different groups and different methods. Moreover, this is the first study to investigate the burning rate characteristics of propene at elevated pressures (> 5 atm).IDT and LFS measurements are compared to predictions of the chemical kinetic mechanism presented in Part I and good agreement is observed.

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“…The calculations are performed using a zero-dimensional model that and incorporates an adiabatic assumption. RCM modeling treatment is further described in [18,23].…”

Section: Rapid Compression Machine Simulationmentioning

confidence: 99%

Section: Vub Flamesmentioning

confidence: 99%

An experimental and modeling study of propene oxidation. Part 2: Ignition delay time and flame speed measurements

Burke

Donagh

et al. 2015

Combustion and Flame

286

208

View full text Add to dashboard Cite

show abstract

“…Nevertheless, as noted by Mittal et al [151], any evaluation of a kinetic scheme by reference to ignition delay times must be treated with some caution when the kinetic uncertainties are not taken into account, since equivalent results may be predicted using very different sets of important parameters. It is then important to consider for validation different sources of data, including results obtained in reactors for slow oxidation.…”

Section: Tables 3 -5mentioning

confidence: 99%

Detailed chemical kinetic models for the low-temperature combustion of hydrocarbons with application to gasoline and diesel fuel surrogates

Battin‐Leclerc

2008

Progress in Energy and Combustion Science

575

379

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“…9 over-predicts the first-stage and total ignition delay times. Mittal et al [47] used a detailed chemical kinetic mechanism to simulate ignition delay times measured in an RCM for syngas mixtures and found they were able to accurately reproduce these data by treating the pressure drop after compression as an adiabatic expansion process using the procedure discussed here. Furthermore, a computational study of H 2 ignition in an RCM [48] showed that zero-D simulations in conjunction with the approach of "adiabatic volume expansion" performs very well in adequately predicting the ignition delay, as compared with the results obtained by CFD simulations, although pressure rise rates could be different for some cases.…”

Section: Or the Ideal Gas Law T(t)=t C [P(t)/p C ][V(t)/v(0)] Wherementioning

confidence: 99%

Using rapid compression machines for chemical kinetics studies

Sung¹,

Curran²

2014

Progress in Energy and Combustion Science

260

127

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Rapid compression machines (RCMs) are used to simulate a single compression stroke of an internal combustion engine without some of the complicated swirl bowl geometry, cycle-to-cycle variation, residual gas, and other complications associated with engine operating conditions. RCMs are primarily used to measure ignition delay times as a function of temperature, pressure, and fuel/oxygen/diluent ratio; further they can be equipped with diagnostics to determine the temperature and flow fields inside the reaction chamber and to measure the concentrations of reactant, intermediate, and product species produced during combustion. This paper first discusses the operational principles and design features of RCMs, including the use of creviced pistons, which is an important feature in order to suppress the boundary layer, preventing it from becoming entrained into the reaction chamber via a roll-up vortex. The paper then discusses methods by which experiments performed in RCMs are interpreted and simulated. Furthermore, differences in measured ignition delays from RCMs and shock tube facilities are discussed, with the apparent initial gross disagreement being explained by facility effects in both types of experiments. Finally, future directions for using RCMs in chemical kinetics studies are also discussed.

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Significance of the HO2+ CO reaction during the combustion of CO + H2 mixtures at high pressures

Cited by 60 publications

References 24 publications

An experimental and modeling study of propene oxidation. Part 2: Ignition delay time and flame speed measurements

An experimental and modeling study of propene oxidation. Part 2: Ignition delay time and flame speed measurements

Detailed chemical kinetic models for the low-temperature combustion of hydrocarbons with application to gasoline and diesel fuel surrogates

Using rapid compression machines for chemical kinetics studies

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