http://www.cnr.it/ontology/cnr/individuo/prodotto/ID295527
Spectroscopic analysis of the phases of premixed combustion in a compression ignition engine fuelled with diesel and ethanol (Articolo in rivista)
- Type
- Label
- Spectroscopic analysis of the phases of premixed combustion in a compression ignition engine fuelled with diesel and ethanol (Articolo in rivista) (literal)
- Anno
- 2015-01-01T00:00:00+01:00 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- E.Mancaruso, B.M.Vaglieco (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Titolo
- Spectroscopic analysis of the phases of premixed combustion in a compression ignition engine fuelled with diesel and ethanol (literal)
- Abstract
- The premixed charge compression ignition (PCCI) combustion represents a possible solution for decreasing
the pollution with respect to diesel engine, while maintaining the efficiency rate at values that are
comparable, and in some cases higher, than those of a diesel engine. This paper investigates the operation
of an optical-access compression ignition engine (bore: 82 mm, stroke: 90 mm) running at PCCI combustion
with neat bio-ethanol and European commercial diesel fuel injected in the intake manifold and into
the cylinder, respectively. In its original configuration, the engine burned diesel and this case was used as
reference of compression ignition combustion. Then, different amounts of bio-ethanol were injected
varying the energizing time of the injector set in the intake manifold. This allowed to create PCCI combustion
with high levels of pre-combustion mixing, and to ensure low equivalence ratio and low flame
temperatures too. Moreover, both the amount and the start of diesel injection was varied to investigate
their effects on the several combustion phases. UV-Visible imaging and spectroscopic measurements
were performed in the engine and the autoignition of the charge, the combustion process and the chemical
species involved were detected and analysed. In particular, optical diagnostics allowed to observe
how the mixture burned: no luminous flame emission in the visible range was recorded; while in the
ultraviolet wavelength range numerous species, like HCO, HCOH, OH, and CO and others were detected.
Varying the in-cylinder premixed ratio the combustion retarded and the rate of heat release passed from
single to three-phase premixed combustion, so revealing a phase due to intermediate temperature reactions.
The same behavior was observed varying the start of injection and the quantity of diesel that
affected the premixed ratio. Spectroscopic measurements revealed that during the intermediate temperature
heat release large amount of OH radical governed the start of combustion of the charge. It was also
observed that the preignition combustion was mainly due to the stratified mixing of the diesel fuel close
to the bowl wall. Finally the presence of OH radical was monitored for the whole combustion process (literal)
- Prodotto di
- Autore CNR
- Insieme di parole chiave
Incoming links:
- Prodotto
- Autore CNR di
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
- Insieme di parole chiave di