Measurement of laminar burning velocity and Markstein length relative to fresh gases using a new postprocessing procedure: Application to laminar spherical flames for methane, ethanol and isooctane/air mixtures

Varéa, Emilien; Modica, Vincent; Vandel, Alexis; Renou, Bruno

doi:10.1016/j.combustflame.2011.09.002

Cited by 143 publications

(62 citation statements)

References 47 publications

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“…A comparison of laminar burning velocity between present work and different techniques of heat flux method of Bosschaart et al [4] and Davis et al [10] are also presented in 7. It can be seen that the present data shows good agreement with the results from [9,10].…”

Section: Stretched Flame Propagation Speeds and Laminar Burning Velocitymentioning

confidence: 99%

“…Iso-butane is selected as a surrogate hydrocarbon fuel for its significance to gasoline. Laminar burning velocity and Markstein length of hydrocarbon fuels are fundamental properties and plays an important role in understanding the behaviour of the flame instabilities and fuel burning rate in the internal combustion engines and different combustible systems [4].…”

Section: Introductionmentioning

confidence: 99%

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An Experimental Measurement on Laminar Burning Velocities and Markstein Length of Iso-Butane-Air Mixtures at Ambient Conditions

Yousif

Sulaiman

Nasif

2016

MATEC Web of Conferences

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Abstract. In the present work, experimental investigation on laminar combustion of iso-butane-air mixtures was conducted in constant volume explosion vessel. The experiments were conducted at wide range of equivalence ratios ranging between Ф = 0.6 and 1.4 and atmospheric pressure of 0.1 MPa and ambient temperature of 303K. Using spherically expanding flame method, flame parameters including stretched, unstretched flame propagation speeds, laminar burning velocities and Markstein length were calculated. For laminar burning velocities the method of error bars of 95% confidence level was applied. In addition, values of Markstein lengths were measured in wide range of equivalence ratios to study the influence of stretch rate on flame instability and burning velocity. It was found that the stretched flame speed and laminar burning velocities increased with equivalence ratios and the peak value was obtained at equivalence ratio of Ф = 1.1. The Markstein length decreased with the increases in equivalence ratios, which indicates that the diffusion thermal flame instability increased at high equivalence ratios in richer mixture side. However, the total deviations in the laminar burning velocities have discrepancies of 1.2-2.9% for all investigated mixtures.

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Section: Stretched Flame Propagation Speeds and Laminar Burning Velocitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Experimental Measurement on Laminar Burning Velocities and Markstein Length of Iso-Butane-Air Mixtures at Ambient Conditions

Yousif

Sulaiman

Nasif

2016

MATEC Web of Conferences

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“…The unstretched laminar burning velocity u l0 was calculated with Equation (5). In a recent paper [33], Varea et al proposed a new approach for the measurement of u l0 , which bypass the evaluation of the expansion factor. The authors highlighted the drawbacks of the approach generally used in the literature, which requires the evaluation of the ratio ρ u /ρ b : this can introduce errors if any of the hypotheses behind Equation (5) are not satisfied.…”

Section: Laminar Burning Propertiesmentioning

confidence: 99%

Burning Behaviour of High-Pressure CH4-H2-Air Mixtures

Moccia

D'Alessio

2013

Energies

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Experimental characterization of the burning behavior of gaseous mixtures has been carried out, analyzing spherical expanding flames. Tests were performed in the Device for Hydrogen-Air Reaction Mode Analysis (DHARMA) laboratory of Istituto Motori-CNR. Based on a high-pressure, constant-volume bomb, the activity is aimed at populating a systematic database on the burning properties of CH 4 , H 2 and other species of interest, in conditions typical of internal combustion (i.c.) engines and gas turbines. High-speed shadowgraph is used to record the flame growth, allowing to infer the laminar burning parameters and the flame stability properties. Mixtures of CH 4 , H 2 and air have been analyzed at initial temperature 293÷305 K, initial pressure 3÷18 bar and equivalence ratio  = 1.0. The amount of H 2 in the mixture was 0%, 20% and 30% (vol.). The effect of the initial pressure and of the Hydrogen content on the laminar burning velocity and the Markstein length has been evaluated: the relative weight and mutual interaction has been assessed of the two controlling parameters. Analysis has been carried out of the flame instability, expressed in terms of the critical radius for the onset of cellularity, as a function of the operating conditions.

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“…Various measurements were performed to accurately determine the laminar flame speed for different reactant mixtures [10][11][12]. A study by Kochar et al [4] utilizing laminar flame speeds of C 1 -C 3 alkanes at elevated pressure and temperature with dilution of N 2 found that CO 2 dilution decreased the flame speed more than the same amount of N 2 dilution [13].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Laminar Flame Speeds and Markstein Length of Propane Air Mixtures at Atmospheric Conditions

Yousif¹,

Sulaiman²,

Nasif³

2015

Int. J. Automot. Mech. Eng.

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An experimental study is performed in this work to determine stretched and unstretched laminar flame propagation velocities, Lewis number, flame thickness and the Markstein length of propane-air mixtures. The spherical flame propagation method was used to achieve this experimental work. Non-premixed propane-air mixtures at ambient temperature 303±1 K, pressure of 0.1 MPa and equivalence ratios ranging from Ф = 0.6 to 1.4 were ignited in a cylindrical combustion chamber. The stretched laminar burning speed was found to increase with the flame radius and time from ignition, which was attributed to flame propagation development. This is achieved by high-speed schlieren cine photography for observation of the flames in the vessel. The results obtained show that the unstretched laminar flame velocity increased as the equivalence ratio increased, and the recorded value reached a maximum at equivalence ratio Ф = 1.0 and decreased at the rich region. It was found that, with increase of the equivalence ratio, the Markstein length is increased and decreased in lean mixtures. The present data were in good agreement with those previously published using different techniques. However, the difference between the peak value of laminar flame velocity in the present work and those in the literature is between 4-5.5%.

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Measurement of laminar burning velocity and Markstein length relative to fresh gases using a new postprocessing procedure: Application to laminar spherical flames for methane, ethanol and isooctane/air mixtures

Cited by 143 publications

References 47 publications

An Experimental Measurement on Laminar Burning Velocities and Markstein Length of Iso-Butane-Air Mixtures at Ambient Conditions

An Experimental Measurement on Laminar Burning Velocities and Markstein Length of Iso-Butane-Air Mixtures at Ambient Conditions

Burning Behaviour of High-Pressure CH4-H2-Air Mixtures

Experimental Study on Laminar Flame Speeds and Markstein Length of Propane Air Mixtures at Atmospheric Conditions

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