A laminar burning velocity and flame thickness correlation for ethanol–air mixtures valid at spark-ignition engine conditions

Vancoillie, Jeroen; Demuynck, Joachim; Galle, Jonas; Verhelst, Sebastian; Oijen, J.A. van

doi:10.1016/j.fuel.2012.05.022

Cited by 46 publications

(17 citation statements)

References 29 publications

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“…However, differences were observed in these models flame speeds simulations. Therefore, we have focused on laminar flame speeds results [80][81][82][83][84][85][86], more specifically in the recent works of Broustail et al [85] and Dirrenberger et al [86] (at T = 400 K and 1 bar), which have been chosen to validate the developed chemical scheme.…”

Section: Ethanol Surrogate Componentmentioning

confidence: 99%

Chemical kinetic mechanism for diesel/biodiesel/ethanol surrogates using n-decane/methyl-decanoate/ethanol blends

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Costa

Backer

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Diesel-biodiesel-ethanol blends have been the focus of research in engines, as biodiesel and ethanol additives can lower pollutant emissions while maintaining diesel performance. To facilitate modeling and analysis, those complex fuels are often substituted by simplified surrogate fuels, composed of only a few well-characterized molecules, but displaying similar properties compared to the fuel that they represent. In this context, the objective of this paper is to develop and validate a new chemical reaction mechanism for diesel-biodiesel-ethanol surrogate fuels. n-Decane and methyl-decanoate (MD) were chosen as the diesel and biodiesel surrogates, respectively, as they are frequently used in the literature. As the available reduced methyl-decanoate models do not reproduce the negative temperature coefficient behavior found in auto-ignition delay experiments, the detailed MD model of Dievart et al. was reduced using DRGEP. This last model was then combined with the reduced n-decane model due to Chang et al. and that of ethanol due to Marinov. Validations are performed on 0D constant-volume auto-ignition by comparing auto-ignition delay times and 1D freely propagating gaseous premixed flame configurations by analyzing laminar flame speeds, using the original single component kinetic models, against the combined surrogate kinetic models, and experimental results found in the literature. Laminar flame speeds of n-decane/methyldecanoate/ethanol blends are also presented.

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Section: Ethanol Surrogate Componentmentioning

confidence: 99%

Chemical kinetic mechanism for diesel/biodiesel/ethanol surrogates using n-decane/methyl-decanoate/ethanol blends

Alviso

Costa

Backer

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…[44e47], Brambilla et al [50,51], and Vancoillie et al [69]. At least 20 grid points within the flame thickness are achieved.…”

Section: Computation Schemementioning

confidence: 99%

Effects of heterogeneous–homogeneous interaction on the homogeneous ignition in hydrogen-fueled catalytic microreactors

Chen

Liu

Gao

et al. 2016

International Journal of Hydrogen Energy

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“…An alternative is to use a flame thickness correlation based on chemical kinetics calculations [19].…”

Section: Simulation Programmentioning

confidence: 99%

Development and Validation of a Quasi-Dimensional Model for (M)Ethanol-Fuelled SI Engines

Vancoillie

Sileghem

Demuynck

et al. 2012

Lecture Notes in Electrical Engineering

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-Methanol and ethanol are interesting spark-ignition engine fuels, both from a production and an end-use point of view. Despite promising experimental results, the full potential of these fuels remain to be explored. In this respect, quasi-dimensional engine simulation codes are especially useful as they allow cheap and fast optimization of engines. The aim of the current work was to develop and validate such a model for methanol-fuelled engines. Several laminar burning velocity correlations and turbulent burning velocity models were implemented in a QD code and their predictive performance was assessed for a wide range of engine operating conditions.The effects of compression ratio and ignition timing on the in-cylinder combustion were well reproduced irrespective of the employed correlation or model. However, to predict the effect of changes in mixture composition, the correlation and model selection proved crucial. Compared to existing correlations, a new correlation developed by the current authors led to better reproduction of the effects of equivalence ratio and residual gas content and the combustion duration.For the turbulent burning velocity, the models of Damköhler and Peters consistently underestimated the influence of equivalence ratio and residual gas content on the combustion duration, while the Gülder, Leeds, Zimont and Fractals model corresponded well with the experiments. The combination of one of these models with the new correlation can be used with confidence to simulate the performance and efficiency of methanol-fuelled engines.INTRODUCTION -The use of sustainable liquid alcohols in spark-ignition engines offers the potential of decarbonizing transport and securing domestic energy supply while increasing engine performance and efficiency compared to fossil fuels thanks to a number of interesting properties [1,2]. The most significant interesting properties of light alcohols include:-High heat of vaporization, which causes considerable charge cooling as the injected fuel evaporates -Elevated knock resistance, which allows to apply higher compression ratios (CR), optimal spark timing and aggressive downsizing. -High flame speeds, enabling qualitative load control using mixture richness or varying amounts of exhaust gas recirculation (EGR). The potential of neat light alcohol fuels (methanol and ethanol) has been demonstrated experimentally in both dedicated and flex-fuel alcohol engines [1]. In dedicated alcohol engines high compression ratios enable peak brake thermal efficiencies up to 42%, while throttleless load control using EGR allows to spread the high efficiencies to the part load regions [1,3]. In flex-fuel engines the CR is limited due to knock constraints associated with gasoline operation, but still relative power and efficiency benefits of about 10% and NO x reductions of 5-10 g/kWh can be obtained over the entire load range thanks to more isochoric combustion, optimal ignition timing and reduced flow and dissociation losses [1].

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A laminar burning velocity and flame thickness correlation for ethanol–air mixtures valid at spark-ignition engine conditions

Cited by 46 publications

References 29 publications

Chemical kinetic mechanism for diesel/biodiesel/ethanol surrogates using n-decane/methyl-decanoate/ethanol blends

Chemical kinetic mechanism for diesel/biodiesel/ethanol surrogates using n-decane/methyl-decanoate/ethanol blends

Effects of heterogeneous–homogeneous interaction on the homogeneous ignition in hydrogen-fueled catalytic microreactors

Development and Validation of a Quasi-Dimensional Model for (M)Ethanol-Fuelled SI Engines

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