Structures of Diesel Sprays in Isobaric Combustion Conditions (Articolo in rivista)

Type
Label
  • Structures of Diesel Sprays in Isobaric Combustion Conditions (Articolo in rivista) (literal)
Anno
  • 1992-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/S0082-0784(06)80182-7 (literal)
Alternative label
  • R. Ragucci, A. Cavaliere, A. Ciajolo, A. D'Anna, A. D'Alessio (1992)
    Structures of Diesel Sprays in Isobaric Combustion Conditions
    in Symposium, International, on Combustion
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • R. Ragucci, A. Cavaliere, A. Ciajolo, A. D'Anna, A. D'Alessio (literal)
Pagina inizio
  • 1565 (literal)
Pagina fine
  • 1571 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • L'International Symposium on Combustion è un evento biennale organizzato dal Combustion Institute a cui partecipa la comunità scientifica mondiale coinvolta nello studio e nella applicazione dei processi di combustione di tutte le tipologie. Per le tematiche coinvolte, l'ambiente scientifico è fortemente multidisciplinare. I lavori scientifici sottomessi per l'accettazione al simposio sono sottoposti ad un processo di peer review altamente selettivo. Infatti è generalmente accettato il 40% dei lavori sottomessi. Dal 2000 gli atti di questo convegno sono diventati una rivista ISI dal titolo The Proceedings of the Combustion Institute, che ha raggiunto in poco tempo un elevato IF per il settore. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S0082078406801827 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 24 (literal)
Rivista
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Ricerche sulla Combustione - CNR Dipartimento di Ingegneria Chimica - Università degli Studi Federico II di Napoli (literal)
Titolo
  • Structures of Diesel Sprays in Isobaric Combustion Conditions (literal)
Abstract
  • A model experiment is presented as a \"bridge\" case between fundamental research and studies on practical combustion systems. The evolution of a diesel spray in high-temperature (900 K), high-prossure (4 MPa), nearly quiescent (cross flow velocity of 1 m/s), oxidative (air) environment is characterized for two injection conditions that are of interest in light-duty diesel engines (1.6 and 6 mg/stroke/hole). Laser light scattering and emission imaging have been used for this purpose along with chemical analysis of material sampled with a fast sampling valve, at 35 mm of distance from the nozzle. The structure of the combustion processes for the two injection conditions show similar features. The oxidation has progressed significantly just after the autoignition. The main autoignition zone, revealed by the pattern of emission in the 500-800 nm spectral range, is located near to the nozzle between 5 and 15 mm. Soot formation extends in the whole field, very early after the autoignition time and it pervades regions around the centerline too. The carbon conversion to soot is no more than 3% also in the richest mixture formed in the injection typical of full load operation of light duty diesel engine and it proceeds simultaneously with the carbon conversion to CO and CO2. The simultaneous detection of oxidation products and unburned fuel and the nonuniformity of the scattering pattern justifies the occurrence of both oxidation and pyrolysis due to the partial mixing of fuel and air on length scales smaller than the sampling volume. The comparison of the diesel combustion structure presented in this paper with those reported in the literature, relative to injections of much higher fuel quantity, suggests that both the experimental conditions define prototypic classes of diesel-like processes, which should be considered as reference models in the analysis of apparatus dependent combustion processes in real diesel engines. (literal)
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