Experimental determination of laminar burning velocity for butanol and ethanol iso-octane blends

Broustail, Guillaume; Seers, Patrice; Halter, Fabien; Moréac, Gladys; Mounaïm‐Rousselle, Christine

doi:10.1016/j.fuel.2010.09.021

Cited by 222 publications

(90 citation statements)

References 23 publications

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“…In the present study, the addition of ethanol results in a similar laminar flame speed enhancement as those of n-propanol, n-butanol and n-pentanol at the equivalence ratios of 0.8 and 1.5, and a higher enhancement rate at 1.0 and 1.2. This result agrees well with the conclusions obtained by Broustail et al [28,29] for ethanol-isooctane and n-butanol-isooctane blends. …”

Section: Laminar Flame Speedsupporting

confidence: 93%

“…The methanol addition into isooctane is identified to be the most effective at The increase rate depends on the kind of alcohol considered. This is consistent with the results obtained by Zhang et al [27] and Broustail et al [28,29]. It also provides support for the conclusions derived on engine tests that the combustion duration was decreased with the alcohols blended into gasoline.…”

Section: Laminar Flame Speedsupporting

confidence: 92%

“…They also investigated the cellular instability characteristics by analyzing the critical Peclect numbers calculated from the Schlieren pictures and stability theory. Broustail et al [28,29] experimentally evaluated the laminar flame speeds and Markstein lengths of n-butanol-isooctane and ethanol-isooctane blends at different initial temperatures and pressures in a constant volume chamber. An empirical formula was given to relate the laminar flame speed and the volume fraction of alcohol.…”

Section: Introductionmentioning

confidence: 99%

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Laminar Flame Characteristics of C1–C5 Primary Alcohol-Isooctane Blends at Elevated Temperature

Jin

Huang

2016

Energies

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Abstract:The laminar combustion characteristics of blends of isooctane and C1-C5 primary alcohols (i.e., methanol, ethanol, n-propanol, n-butanol and n-pentanol) were investigated using the spherical expanding flame methodology in a constant volume chamber at various equivalence ratios and volume fractions of alcohol. The stretch effect was removed using the nonlinear methodology. The results indicate that the laminar flame speeds of alcohol-isooctane blends increase monotonously with the increasing volume fraction of alcohol. Among the five alcohols, the addition of methanol is identified to be the most effective in enhancing laminar flame speed. The addition of ethanol results in an approximately equivalent laminar flame speed enhancement rate as those of n-propanol, n-butanol and n-pentanol at ratios of 0.8 and 1.5, and a higher rate at 1.0 and 1.2. An empirical correlation is provided to describe the laminar flame speed variation with the volume fraction of alcohol. Meanwhile, the laminar flame speed increases with the mass content of oxygen in the fuel blends. At the equivalence ratio of 0.8 and fixed oxygen content, similar laminar flame speeds are observed with different alcohols blended into isooctane. Nevertheless, with the increase of equivalence ratio, heavier alcohol-isooctane blends tend to exhibit higher values. Markstein lengths of alcohol-isooctane blends decrease with the addition of alcohol into isooctane at 0.8, 1.0 and 1.2, however they increase at 1.5. This is consistent with the behavior deduced from the Schlieren images.

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Section: Laminar Flame Speedsupporting

confidence: 93%

Section: Laminar Flame Speedsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Laminar Flame Characteristics of C1–C5 Primary Alcohol-Isooctane Blends at Elevated Temperature

Jin

Huang

2016

Energies

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“…(Broustail et al 2011) and higher than that of hexadecane flame (Chaos et al 2005) at stoichiometry. Increasing φ from 0.32 to 0.40 causes a burning speed of both perforated and secondary Bunsen flame decreases.…”

Section: Laminar Flame Velocitymentioning

confidence: 88%

Premixed Combustion of Kapok (ceiba pentandra) seed oil on Perforated Burner

Wirawan

Wardana

Soenoko

et al. 2014

Int. J. Renew. Energy Dev.

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Availability of fossil fuels in the world decrease gradually due to excessive fuel exploitation. This situations push researcher to look for alternative fuels as a source of renewable energy, one of them is kapok (ceiba pentandra) seed oil. The aim this study was to know the behavior of laminar burning velocity, secondary Bunsen flame with open tip, cellular and triple flame. Premixed combustion of kapok seed oil was studied experimentally on perforated burner with equivalence ratio (φ) varied from 0.30 until 1.07. The results showed that combustion of glycerol requires a large amount of air so that laminar burning velocity (SL) is the highest at very lean mixture (φ =0.36) in the form of individual Bunsen flame on each of the perforated plate hole. Perforated and secondary Bunsen flame both reached maximum SL similar with that of ethanol and higher than that of hexadecane. Slight increase of φ decreases drastically SL of perforated and secondary Bunsen flame. When the mixture was enriched, secondary Bunsen and perforated flame disappears, and then the flame becomes Bunsen flame with open tip and triple flame (φ = 0.62 to 1.07). Flame was getting stable until the mixture above the stoichiometry. Being isolated from ambient air, the SL of perforated flame, as well as secondary Bunsen flame, becomes equal with non-isolated flame. This shows the decreasing trend of laminar burning velocity while φ is increasing. When the mixture was enriched island (φ = 0.44 to 0.48) and petal (φ = 0.53 to 0.62) cellular flame take place. Flame becomes more unstable when the mixture was changed toward stoichiometry.

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“…However, methods to distinguish in-cycle bulk velocities from high-frequency turbulence values were also applied to the LDV data of the current engine according to [71] and these led to u values of ~1.5 m/s [55]. The laminar burning velocities of [40,41] at 5 bar, 423 K were used as baseline, whilst all the other parameters were calculated for 5 bar, 500 K, the approximate pressure and temperature at ignition as obtained from the engine's pressure traces. The resultant values placed the regime of combustion close to the boundary between corrugated flamelets and distributed reactions as shown in the Peters-Borghi diagram of Figure A1 in the Appendix for 1.5 and 3 m/s turbulence intensity.…”

Section: Flame Speed and Roundnessmentioning

confidence: 99%

Flame front analysis of ethanol, butanol, iso-octane and gasoline in a spark-ignition engine using laser tomography and integral length scale measurements

Aleiferis

Behringer

2015

Combustion and Flame

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Experimental determination of laminar burning velocity for butanol and ethanol iso-octane blends

Cited by 222 publications

References 23 publications

Laminar Flame Characteristics of C1–C5 Primary Alcohol-Isooctane Blends at Elevated Temperature

Laminar Flame Characteristics of C1–C5 Primary Alcohol-Isooctane Blends at Elevated Temperature

Premixed Combustion of Kapok (ceiba pentandra) seed oil on Perforated Burner

Flame front analysis of ethanol, butanol, iso-octane and gasoline in a spark-ignition engine using laser tomography and integral length scale measurements

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