Determination of and Fuel Structure Effects on Laminar Flame Speeds of C<sub>1</sub>to C<sub>8</sub>Hydrocarbons

Davis, Scott; Law, Chung K.

doi:10.1080/00102209808915781

Cited by 382 publications

(224 citation statements)

References 8 publications

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“…The iso-butane unstretched laminar burning velocity shows slight shift towards the fuel-rich region like the behavior of ethane-air flames, where the peak burning velocity obtained at Ф = 1.1. This trend is similar to those observed in previous studies [9,10], whose values of unstretched laminar burning velocity were also extracted linearly. In addition, both the systematic (P ୗ ) and random ‫ܤ(‬ ௌ ) uncertainties of laminar burning velocities in present work were performed as shown in Figure 7.…”

Section: Stretched Flame Propagation Speeds and Laminar Burning Velocitysupporting

confidence: 78%

“…Furthermore, the present results are slightly lower than the data of n-butaneair mixtures obtained by Davis et al [10] and in good agreement with n-butane data of Kelley et al [8]. As shown in Figure 7, the n-butane-air mixtures shows higher laminar burning velocity compaired to iso-butane-air mixtures and this difference is due to the higher heat of combustion for n-butane than iso-butane.…”

Section: Stretched Flame Propagation Speeds and Laminar Burning Velocitycontrasting

confidence: 54%

“…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%

“…The deviations of this method are relatively large in the lean and rich flames. Furthermore, Davis et al [10] investigated the laminar flame speeds of nbutane and iso-butane-air flame using counterflow method. N-butane-air flames showed higher laminar burning velocity than n-butane-air mixtures.…”

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 Velocitysupporting

confidence: 78%

Section: Stretched Flame Propagation Speeds and Laminar Burning Velocitycontrasting

confidence: 54%

Section: Stretched Flame Propagation Speeds and Laminar Burning Velocitymentioning

confidence: 99%

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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“…Similar observations were also made on normal and branched hydrocarbons by. 17,18,25,26 Those studies noted that increase in methyl substitutions leads to the formation of less reactive intermediates, some of which are resonantly stable, thereby decreasing the overall reactivity. Overall, the model was able to predict the trends observed in the experiment except for n-propanol.…”

Section: Autoignition Resultsmentioning

confidence: 99%

Effects of Substitution on Counterflow Ignition and Extinction of C3 and C4 Alcohols

et al. 2016

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ABSTRACT. Dwindling reserves and inherent uncertainty in the price of conventional fuels necessitates a search for alternative fuels. Alcohols represent a potential source of energy for the future. The structural features of an alcohol fuel have a direct impact on combustion properties.In particular, substitution in alcohols can alter the global combustion reactivity. In this study, experiments and numerical simulations were conducted to investigate the critical conditions of extinction and autoignition of n-propanol, 1-butanol, iso-propanol and iso-butanol in nonpremixed diffusion flames. Experiments were carried out in the counterflow configuration, while simulations were conducted using a skeletal chemical kinetic model for the C3 and C4 alcohols.The fuel stream consists of the pre-vaporized fuel diluted with nitrogen, while the oxidizer 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 2 stream is air. The experimental results show that autoignition temperatures of the tested alcohols increase in the following order: iso-propanol > iso-butanol > 1-butanol ≈ n-propanol. The simulated results for the branched alcohols agree with the experiments, while the autoignition temperature of 1-butanol is slightly higher than that of n-propanol. For extinction, the experiments show that the extinction limits of the tested fuels increase in the following order: npropanol ≈ 1-butanol > iso-butanol > iso-propanol. The model suggests that the extinction limits of 1-butanol is slightly higher than n-propanol with extinction strain rate of iso-butanol and isopropanol maintaining the experimentally observed trend. The transport weighted enthalpy (TWE) and radical index (Ri) concepts were utilized to rationalize the observed reactivity trends for these fuels.

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Detailed kinetic modeling of 1,3-butadiene oxidation at high temperatures

Laskin

Hai

Law

2000

Int. J. Chem. Kinet.

151

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Determination of and Fuel Structure Effects on Laminar Flame Speeds of C₁to C₈Hydrocarbons

Cited by 382 publications

References 8 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

Effects of Substitution on Counterflow Ignition and Extinction of C3 and C4 Alcohols

Detailed kinetic modeling of 1,3-butadiene oxidation at high temperatures

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Determination of and Fuel Structure Effects on Laminar Flame Speeds of C1to C8Hydrocarbons

Cited by 382 publications

References 8 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

Effects of Substitution on Counterflow Ignition and Extinction of C3 and C4 Alcohols

Detailed kinetic modeling of 1,3-butadiene oxidation at high temperatures

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Determination of and Fuel Structure Effects on Laminar Flame Speeds of C₁to C₈Hydrocarbons