Analysis of the GDI spray dynamics through multidimensional modeling and flow visualization in an optically accessible SI engine (Contributo in atti di convegno)

Type
Label
  • Analysis of the GDI spray dynamics through multidimensional modeling and flow visualization in an optically accessible SI engine (Contributo in atti di convegno) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Alternative label
  • M.Costa, U.Sorge, P.Sementa, A.Montanaro (2014)
    Analysis of the GDI spray dynamics through multidimensional modeling and flow visualization in an optically accessible SI engine
    in Proceedings of the ASME 2014 - 12th Biennal Conference on Engineering Systems Design and Analysis - ESDA 2014, Copenhagen (Denmark), 25-27 giugno 2014
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M.Costa, U.Sorge, P.Sementa, A.Montanaro (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 10 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • --- (literal)
Titolo
  • Analysis of the GDI spray dynamics through multidimensional modeling and flow visualization in an optically accessible SI engine (literal)
Abstract
  • Present work is aimed at studying into detail mixture formation and combustion in a gasoline direct injection (GDI) engine working under stoichiometric mixture conditions. The study is performed both numerically and experimentally. From the experimental side, the engine, optically accessible, is characterized by collecting, for various injection strategies, incylinder pressure cycles and digital images. From the numerical side, a 3D engine model is developed, that includes proper submodels for the spray dynamics and the spray-wall interaction. This last phenomenon is studied into detail by resorting to a preliminary 3D simulation of the spray impingement realized in a proper experiment, where the engine injector is mounted at a certain distance from a cold or hot wall. An interesting comparison between numerical and experimental images of the in-cylinder spray dynamics is presented, that also allows individuating the difference in the wallfilm deposition under various injection strategies. This opens the way to understand the difference in the combustion development arising as injection is anticipated or retarded in the engine working cycle. (literal)
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