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Effect of a novel piston geometry on the combustion process of a light-duty compression ignition engine: An optical analysis

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  • Pastor, José V.
  • García, Antonio
  • Micó, Carlos
  • Lewiski, Felipe
  • Vassallo, Alberto
  • Pesce, Francesco Concetto

Abstract

The development of new piston geometries has shown great potential to achieve the low levels of soot emissions required by regulation. Thus, the present paper aims to characterize the influence of a new piston design over combustion process. It is characterized by the introduction of protrusions around the periphery of the bowl, evenly spaced. The performance of this geometry is compared to other geometries that have been extensively analyzed in literature, under similar operating conditions. To achieve this objective, a single cylinder optical compression ignition engine was used with full-quartz pistons representing three bowl geometries: re-entrant, stepped lip and wave-stepped lip. Two optical techniques (OH∗ chemiluminescence and Natural Luminosity-NL) were applied for identifying the near-stoichiometric zones and the differences in the combustion evolution. The flame movement was analyzed by applying the combustion image velocimetry (CIV) algorithms. In addition, an in-cylinder pressure analysis was performed for each piston at 4.5 bar and 7.5 bar IMEP and the differences in terms of Rate of Heat Release were highlighted. A more intense reverse flow was clearly identified when using wave protrusions inside the bowl. The stepped lip and wave-stepped lip bowl present faster late cycle oxidation with much near-stoichiometric zones than re-entrant piston.

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  • Pastor, José V. & García, Antonio & Micó, Carlos & Lewiski, Felipe & Vassallo, Alberto & Pesce, Francesco Concetto, 2021. "Effect of a novel piston geometry on the combustion process of a light-duty compression ignition engine: An optical analysis," Energy, Elsevier, vol. 221(C).
    • Handle: RePEc:eee:energy:v:221:y:2021:i:c:s036054422100013x
    DOI: 10.1016/j.energy.2021.119764
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    References listed on IDEAS

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    1. Leach, Felix & Ismail, Riyaz & Davy, Martin & Weall, Adam & Cooper, Brian, 2018. "The effect of a stepped lip piston design on performance and emissions from a high-speed diesel engine," Applied Energy, Elsevier, vol. 215(C), pages 679-689.
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    4. Benajes, Jesús & García, Antonio & Monsalve-Serrano, Javier & Lago Sari, Rafael, 2018. "Fuel consumption and engine-out emissions estimations of a light-duty engine running in dual-mode RCCI/CDC with different fuels and driving cycles," Energy, Elsevier, vol. 157(C), pages 19-30.
    5. García, Antonio & Monsalve-Serrano, Javier & Villalta, David & Lago Sari, Rafael & Gordillo Zavaleta, Victor & Gaillard, Patrick, 2019. "Potential of e-Fischer Tropsch diesel and oxymethyl-ether (OMEx) as fuels for the dual-mode dual-fuel concept," Applied Energy, Elsevier, vol. 253(C), pages 1-1.
    6. Kumar, Shiva & Dinesha, P. & Rosen, Marc A., 2019. "Effect of injection pressure on the combustion, performance and emission characteristics of a biodiesel engine with cerium oxide nanoparticle additive," Energy, Elsevier, vol. 185(C), pages 1163-1173.
    7. Pastor, José V. & García, Antonio & Micó, Carlos & Lewiski, Felipe, 2020. "An optical investigation of Fischer-Tropsch diesel and Oxymethylene dimethyl ether impact on combustion process for CI engines," Applied Energy, Elsevier, vol. 260(C).
    8. Runge, Philipp & Sölch, Christian & Albert, Jakob & Wasserscheid, Peter & Zöttl, Gregor & Grimm, Veronika, 2019. "Economic comparison of different electric fuels for energy scenarios in 2035," Applied Energy, Elsevier, vol. 233, pages 1078-1093.
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    1. Doppalapudi, A.T. & Azad, A.K. & Khan, M.M.K., 2021. "Combustion chamber modifications to improve diesel engine performance and reduce emissions: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 152(C).
    2. Arun Teja Doppalapudi & Abul Kalam Azad & Mohammad Masud Kamal Khan, 2023. "Analysis of Improved In-Cylinder Combustion Characteristics with Chamber Modifications of the Diesel Engine," Energies, MDPI, vol. 16(6), pages 1-18, March.

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