Evaluation of soot and flame lift-off length in a high swirl optically accessed Diesel engine (Contributo in atti di convegno)

Type
Label
  • Evaluation of soot and flame lift-off length in a high swirl optically accessed Diesel engine (Contributo in atti di convegno) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Esposito Corcione F., Iannuzzi S., Marchitto L., Merola S.S., Valentino G. (2011)
    Evaluation of soot and flame lift-off length in a high swirl optically accessed Diesel engine
    in . Proceed¬ings 10th Engine Combustion Processes Congress: Current Problems and Modern Techniques, München (Germany)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Esposito Corcione F., Iannuzzi S., Marchitto L., Merola S.S., Valentino G. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • pp. 437-448 (ISBN 3-931901-72-6). (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • In diesel engine environment, it is known that the flame lift-off length strongly influences the soot formation. Besides, the flame lift-off length is affected by incylinder gas density, air swirl and jet to jet interaction. To understand the role played by these factors on lift-off length and soot formation, optical imaging and UV-visible detection of in-cylinder combustion phenomena were made in an optically accessed high swirl multi-jets compression ignition engine operating with two different fuels and two EGR levels. A commercial diesel fuel and a blend of diesel (80%) and gasoline (20%), denoted as G20, for different injection pressure and timings were used. The blend G20 has a lower cetane number and it is more volatile and more resistant to the auto-ignition than diesel. At late injection timing and high EGR (50%), the G20 blend increased the ignition delay giving more time for the gas charge mixing. The increased ignition delay allowed to operate in premixed LTC regime in which the fuel was completely injected before the start of combustion. The optical data of G20 tests showed a clear link between the liftoff length and the soot production. The increase of lift-off length corresponded to a decrease of in-cylinder soot production. The G20 blend, at 50% of EGR, allowed to operate in LTC regime in which a strong decrease of soot formation joined to reduced engine out emissions were observed. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto Motori, CNR, Napoli. (literal)
Titolo
  • Evaluation of soot and flame lift-off length in a high swirl optically accessed Diesel engine (literal)
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