Measurement of Adiabatic Burning Velocity in Methane-Oxygen-Nitrogen Mixtures

Dyakov, Igor; Konnov, Alexander A.; Ruyck, de J; Bosschaart, KJ Karel Joop; Brock, Ecm Erwin; Goey, de Lph Philip

doi:10.1080/00102200108935839

Cited by 104 publications

(74 citation statements)

References 12 publications

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“…This method was extensively used for measuring laminar burning velocities of gaseous fuels [14][15][16] and has recently been extended towards liquid fuels [17]. The designed burner is consisting of three separated parts which are overlapped on each other and have formed one unique burner.…”

Section: Methodsmentioning

confidence: 99%

Effects of pressure and carbon dioxide, hydrogen and nitrogen concentration on laminar burning velocities and NO formation of methane-air mixtures

Zahedi

Yousefi

2014

J Mech Sci Technol

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To cite this version:Peyman Zahedi, Kianoosh Yousefi. Effects of pressure and carbon dioxide, hydrogen and nitrogen concentration on laminar burning velocities and NO formation of methane-air mixtures. AbstractIn this research we have studied the effects of increasing pressure and adding carbon dioxide, hydrogen and nitrogen to Methane-air mixture on premixed laminar burning velocity and NO formation in experimentally and numerically methods. Equivalence ratio was considered within 0.7 to 1.3 for initial pressure between 0.1 to 0.5 MPa and initial temperature was separately considered 298 K. Mole fractions of carbon dioxide, hydrogen and nitrogen were regarded in mixture from 0 to 0.2. Heat flux method was used for measurement of burning velocities of Methane-air mixtures diluted with CO2 and N2. Experimental results were compared to the calculations using a detailed chemical kinetic scheme (GRI-MECH 3.0). At first, the results in atmosphere pressure for Methane-air mixture were calculated and it was compared with the results of literature. Results were in good agreement with published data in the literature. Afterwards, by adding carbon dioxide and nitrogen to Methane-air mixture, we witnessed that laminar burning velocity was decreased, whereas by increasing hydrogen, the laminar burning velocity was increased. Finally, the results showed that by increasing the pressure, the premixed laminar burning velocity decreased for all mixtures and NO formation indicates considerable increase, whereas the laminar flame thickness decreases.

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Section: Methodsmentioning

confidence: 99%

Effects of pressure and carbon dioxide, hydrogen and nitrogen concentration on laminar burning velocities and NO formation of methane-air mixtures

Zahedi

Yousefi

2014

J Mech Sci Technol

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“…This installation has been described in detail previously [28,29] and has been used extensively for adiabatic stabilization of premixed flames and for measuring laminar burning velocity of different gaseous fuels. Adiabatic flames were stabilized using the heat flux method on a perforated plate burner at atmospheric pressure.…”

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

288

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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“…Detailed analyses of these uncertainties were performed earlier 32,33 and repeated for the present installation and showed that the overall accuracy of the burning velocity measurements is better than ±0.8 cm/s (double standard deviation with a 95% confidence level). The relative inaccuracy of the equivalence ratio was found to be below 1.5%.…”

Section: ■ Error Assessmentmentioning

confidence: 99%

“…19 A detailed description of the method and associated experimental uncertainties for gaseous fuels are given elsewhere. 32,33 Important features of the method common for gaseous and liquid fuels are, therefore, only shortly outlined in the following. The present experimental rig is similar to that used by Konnov et al 19 and has been constructed and certified in previous work.…”

Section: ■ Introductionmentioning

confidence: 99%

Temperature Dependence of the Laminar Burning Velocity of Methanol Flames

Vancoillie

Christensen²,

Nilsson³

et al. 2012

Energy Fuels

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To better understand and predict the combustion behavior of methanol in engines, sound knowledge of the effect of the pressure, unburned mixture temperature, and composition on the laminar burning velocity is required. Because many of the existing experimental data for this property are compromised by the effects of flame stretch and instabilities, this study was aimed at obtaining new, accurate data for the laminar burning velocity of methanol−air mixtures. Non-stretched flames were stabilized on a perforated plate burner at 1 atm. The heat flux method was used to determine burning velocities under conditions when the net heat loss from the flame to the burner is zero. Equivalence ratios and initial temperatures of the unburned mixture ranged from 0.7 to 1.5 and from 298 to 358 K, respectively. Uncertainties of the measurements were analyzed and assessed experimentally. The overall accuracy of the burning velocities was estimated to be better than ±1 cm/s. In lean conditions, the correspondence with recent literature data was very good, whereas for rich mixtures, the deviation was larger. The present study supports the higher burning velocities at rich conditions, as predicted by several chemical kinetic mechanisms. The effects of the unburned mixture temperature on the laminar burning velocity of methanol were analyzed using the correlation u L = u L0 (T u /T u0 ) α . Several published expressions for the variation of the power exponent α with the equivalence ratio were compared against the present experimental results and calculations using a detailed oxidation kinetic model. Whereas most existing expressions assume a linear decrease of α with an increasing equivalence ratio, the modeling results produce a minimum in α for slightly rich mixtures. Experimental determination of α was only possible for lean to stoichiometric mixtures and a single data point at ϕ = 1.5. For these conditions, the measurement data agree with the modeling results.

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Measurement of Adiabatic Burning Velocity in Methane-Oxygen-Nitrogen Mixtures

Cited by 104 publications

References 12 publications

Effects of pressure and carbon dioxide, hydrogen and nitrogen concentration on laminar burning velocities and NO formation of methane-air mixtures

Effects of pressure and carbon dioxide, hydrogen and nitrogen concentration on laminar burning velocities and NO formation of methane-air mixtures

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

Temperature Dependence of the Laminar Burning Velocity of Methanol Flames

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