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Laminar burning velocity correlations for methanol-air and ethanol-air mixtures valid at SI engine conditions

Jeroen Vancoillie (UGent) , Sebastian Verhelst (UGent) and Joachim Demuynck (UGent)
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Abstract
The use of methanol and ethanol in spark-ignition (SI) engines forms a promising approach to decarbonizing transport and securing domestic energy supply. The physico-chemical properties of these fuels enable engines with increased performance and efficiency compared to their fossil fuel counterparts. An engine cycle code valid for alcohol-fuelled engines could help to unlock their full potential. However, the development of such a code is currently hampered by the lack of a suitable correlation for the laminar flame speed of alcohol-air-diluent mixtures. A literature survey showed that none of the existing correlations covers the entire temperature, pressure and mixture composition range as encountered in spark-ignition engines. For this reason, we started working on new correlations based on simulations with a one-dimensional chemical kinetics code. In this paper the properties of methanol and ethanol are first presented, together with their application in modern SI engines. Then, the published experimental data for the laminar burning velocity are reviewed. Next, the performance of several reaction mechanisms for the oxidation kinetics of methanol- and ethanol-air mixtures is compared. The best performing mechanisms are used to calculate the laminar burning velocity of these mixtures in a wide range of temperatures, pressures and compositions. Finally, based on these calculations, two laminar burning velocity correlations covering the entire operating range of alcohol-fuelled spark-ignition engines, are presented. These correlations can now be implemented in an engine code.
Keywords
methanol, chemical kinetics, quasi-dimensional, internal combustion engine, simulation, ethanol, laminar burning velocity

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Chicago
Vancoillie, Jeroen, Sebastian Verhelst, and Joachim Demuynck. 2011. “Laminar Burning Velocity Correlations for Methanol-air and Ethanol-air Mixtures Valid at SI Engine Conditions.” In SAE 2011 World Congress & Exhibition : Modeling of SI and Diesel Engines : Combustion Modeling, Proceedings. Detroit, MI, USA: Society of Automotive Engineers SAE.
APA
Vancoillie, J., Verhelst, S., & Demuynck, J. (2011). Laminar burning velocity correlations for methanol-air and ethanol-air mixtures valid at SI engine conditions. SAE 2011 world congress & exhibition : modeling of SI and diesel engines : combustion modeling, Proceedings. Presented at the SAE 2011 World Congress & Exhibition : Modeling of SI and Diesel Engines : Combustion Modeling, Detroit, MI, USA: Society of Automotive Engineers SAE.
Vancouver
1.
Vancoillie J, Verhelst S, Demuynck J. Laminar burning velocity correlations for methanol-air and ethanol-air mixtures valid at SI engine conditions. SAE 2011 world congress & exhibition : modeling of SI and diesel engines : combustion modeling, Proceedings. Detroit, MI, USA: Society of Automotive Engineers SAE; 2011.
MLA
Vancoillie, Jeroen, Sebastian Verhelst, and Joachim Demuynck. “Laminar Burning Velocity Correlations for Methanol-air and Ethanol-air Mixtures Valid at SI Engine Conditions.” SAE 2011 World Congress & Exhibition : Modeling of SI and Diesel Engines : Combustion Modeling, Proceedings. Detroit, MI, USA: Society of Automotive Engineers SAE, 2011. Print.
@inproceedings{1202076,
  abstract     = {The use of methanol and ethanol in spark-ignition (SI) engines forms a promising approach to decarbonizing transport and securing domestic energy supply. The physico-chemical properties of these fuels enable engines with increased performance and efficiency compared to their fossil fuel counterparts. An engine cycle code valid for alcohol-fuelled engines could help to unlock their full potential. However, the development of such a code is currently hampered by the lack of a suitable correlation for the laminar flame speed of alcohol-air-diluent mixtures. A literature survey showed that none of the existing correlations covers the entire temperature, pressure and mixture composition range as encountered in spark-ignition engines. For this reason, we started working on new correlations based on simulations with a one-dimensional chemical kinetics code. In this paper the properties of methanol and ethanol are first presented, together with their application in modern SI engines. Then, the published experimental data for the laminar burning velocity are reviewed. Next, the performance of several reaction mechanisms for the oxidation kinetics of methanol- and ethanol-air mixtures is compared. The best performing mechanisms are used to calculate the laminar burning velocity of these mixtures in a wide range of temperatures, pressures and compositions. Finally, based on these calculations, two laminar burning velocity correlations covering the entire operating range of alcohol-fuelled spark-ignition engines, are presented. These correlations can now be implemented in an engine code.},
  articleno    = {2011-01-0846},
  author       = {Vancoillie, Jeroen and Verhelst, Sebastian and Demuynck, Joachim},
  booktitle    = {SAE 2011 world congress \& exhibition : modeling of SI and diesel engines : combustion modeling, Proceedings},
  isbn         = {9780768047530},
  keyword      = {methanol,chemical kinetics,quasi-dimensional,internal combustion engine,simulation,ethanol,laminar burning velocity},
  language     = {eng},
  location     = {Detroit, MI, USA},
  pages        = {35},
  publisher    = {Society of Automotive Engineers SAE},
  title        = {Laminar burning velocity correlations for methanol-air and ethanol-air mixtures valid at SI engine conditions},
  url          = {http://dx.doi.org/10.4271/2011-01-0846},
  year         = {2011},
}

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