http://www.cnr.it/ontology/cnr/individuo/prodotto/ID189771
Investigation of diesel injector nozzle flow number impact on spray formation and combustion evolution by optical diagnostics (Articolo in rivista)
- Type
- Label
- Investigation of diesel injector nozzle flow number impact on spray formation and combustion evolution by optical diagnostics (Articolo in rivista) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.4271/2012-01-0701 (literal)
- Alternative label
Luigi Allocca, Bianca Maria Vaglieco, Alessandro Montanaro, Ezio Mancaruso, Claudio Ciaravino, Giovanni Avolio (2012)
Investigation of diesel injector nozzle flow number impact on spray formation and combustion evolution by optical diagnostics
in SAE technical paper series
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Luigi Allocca, Bianca Maria Vaglieco, Alessandro Montanaro, Ezio Mancaruso, Claudio Ciaravino, Giovanni Avolio (literal)
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Claudio Ciaravino - General Motors Company
Giovanni Avolio - General Motors Powertrain Europe (literal)
- Titolo
- Investigation of diesel injector nozzle flow number impact on spray formation and combustion evolution by optical diagnostics (literal)
- Abstract
- The present paper describes an experimental investigation
over the impact of diesel injector nozzle flow number on
spray formation and combustion evolution for a modern
EURO5 light-duty diesel engine. The analysis has been
carried out by coupling the investigations in non evaporative
spray bomb to tests in optical single cylinder engine in firing
conditions.
The research activity, which is the result of a collaborative
project between Istituto Motori Napoli - CNR and GM
Powertrain Europe, is devoted to understanding the basic
operating behaviour of low flow number nozzles which are
showing promising improvements in diesel engine behaviour
at partial load. In fact, because of the compelling need to
push further emission, efficiency, combustion noise and
power density capabilities of the last-generation diesel
engines, the combination of high injection pressure fuel
pumps and low flow number nozzles is general trend among
major OEMs. Therefore, aim of this paper is to provide a
deeper understanding about the link between the nozzle flow
number, the spray and mixture formation and the consequent
combustion behaviour for different nozzle geometries and
engine operating conditions typical of diesel engine
operating. Main deliverables of the above mentioned activity
will be guidelines for a balanced nozzle flow number
selection and references for upgrading 3D-CFD simulations
spray models.
Spatial and temporal spray characterizations have been
evaluated for three different nozzle flow numbers for a 2.0L
diesel engine in various operating conditions. The results
confirm that by reducing the flow number, for low injected
quantities typical of low load and speed engine conditions,
better fuel/air mixing is achieved. On the contrary, increasing
the injected quantity (as for medium/high load and speed
conditions) flow number reduction requires engine recalibration
in order to keep the advantages of mixture
formation. (literal)
- Prodotto di
- Autore CNR
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