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Dynamic Adaptive Chemistry applied to homogeneous and partially stratified charge CI ethanol engines

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  • Viggiano, Annarita
  • Magi, Vinicio

Abstract

The Dynamic Adaptive Chemistry (DAC) technique is extended in this work to multidimensional simulations of ethanol HCCI/PSCCI engines. Several DAC computations have been performed by using two kinetic reaction mechanisms of ethanol with different levels of detail, that include 57 species and 135 species, respectively. The specific choice of the DAC parameters, i.e. the set of search-initiating species and the tolerance value, has been carefully analyzed. The simulations show that very accurate results, in terms of pressure and heat release rate profiles and CO, CO2 and UHC emissions, are obtained with ethanol as the only species for the graph search both with the fuel uniformly distributed and by directly injecting liquid fuel in the combustion chamber. As regards NOx, specific attention has been addressed to the analysis of the NOx formation in order to correctly reproduce the paths that lead to NOx emissions for the different cases. The choice of ethanol–N2O as search-initiating set has given the best results with negligible errors with respect to the full mechanism. For the single-zone computations, the use of DAC provides a speed-up of the 135-species full mechanism more than 9, whereas, with respect to the 57-species mechanism, about 50% of the computational time is saved in the multidimensional simulations.

Suggested Citation

  • Viggiano, Annarita & Magi, Vinicio, 2014. "Dynamic Adaptive Chemistry applied to homogeneous and partially stratified charge CI ethanol engines," Applied Energy, Elsevier, vol. 113(C), pages 848-863.
  • Handle: RePEc:eee:appene:v:113:y:2014:i:c:p:848-863
    DOI: 10.1016/j.apenergy.2013.08.002
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    References listed on IDEAS

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    1. Wu, Horng-Wen & Wang, Ren-Hung & Ou, Dung-Je & Chen, Ying-Chuan & Chen, Teng-yu, 2011. "Reduction of smoke and nitrogen oxides of a partial HCCI engine using premixed gasoline and ethanol with air," Applied Energy, Elsevier, vol. 88(11), pages 3882-3890.
    2. Viggiano, Annarita & Magi, Vinicio, 2012. "A comprehensive investigation on the emissions of ethanol HCCI engines," Applied Energy, Elsevier, vol. 93(C), pages 277-287.
    3. Hulwan, Dattatray Bapu & Joshi, Satishchandra V., 2011. "Performance, emission and combustion characteristic of a multicylinder DI diesel engine running on diesel–ethanol–biodiesel blends of high ethanol content," Applied Energy, Elsevier, vol. 88(12), pages 5042-5055.
    4. Saxena, Samveg & Schneider, Silvan & Aceves, Salvador & Dibble, Robert, 2012. "Wet ethanol in HCCI engines with exhaust heat recovery to improve the energy balance of ethanol fuels," Applied Energy, Elsevier, vol. 98(C), pages 448-457.
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    Cited by:

    1. Fanelli, Emanuele & Viggiano, Annarita & Braccio, Giacobbe & Magi, Vinicio, 2014. "On laminar flame speed correlations for H2/CO combustion in premixed spark ignition engines," Applied Energy, Elsevier, vol. 130(C), pages 166-180.
    2. Zhang, Y. & Zhao, H., 2014. "Investigation of combustion, performance and emission characteristics of 2-stroke and 4-stroke spark ignition and CAI/HCCI operations in a DI gasoline," Applied Energy, Elsevier, vol. 130(C), pages 244-255.
    3. Noh, Hyun Kwon & No, Soo-Young, 2017. "Effect of bioethanol on combustion and emissions in advanced CI engines: HCCI, PPC and GCI mode – A review," Applied Energy, Elsevier, vol. 208(C), pages 782-802.
    4. Komninos, N.P. & Rakopoulos, C.D., 2016. "Heat transfer in hcci phenomenological simulation models: A review," Applied Energy, Elsevier, vol. 181(C), pages 179-209.

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