http://www.cnr.it/ontology/cnr/individuo/prodotto/ID274394
Combustion process investigation in a high speed diesel engine fuelled with n-butanol diesel blend by conventional methods and optical diagnotics (Articolo in rivista)
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- Combustion process investigation in a high speed diesel engine fuelled with n-butanol diesel blend by conventional methods and optical diagnotics (Articolo in rivista) (literal)
- Anno
- 2014-01-01T00:00:00+01:00 (literal)
- Alternative label
Merola S.S., Tornatore C., Iannuzzi S.E., Marchitto L., Valentino G. (2014)
Combustion process investigation in a high speed diesel engine fuelled with n-butanol diesel blend by conventional methods and optical diagnotics
in Renewable energy
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- Merola S.S., Tornatore C., Iannuzzi S.E., Marchitto L., Valentino G. (literal)
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- Titolo
- Combustion process investigation in a high speed diesel engine fuelled with n-butanol diesel blend by conventional methods and optical diagnotics (literal)
- Abstract
- The use of alternative fuels, as biodiesel and ethanol, for light duty CI engines to approach the target of
ultra low NOx and PM emissions without fuel economy penalty has been widely investigated. Recently, it
is growing the interest in the butanol as a viable alternative either single or blended with conventional
based fuels both to cut the demand for fossil fuel and to reduce emissions of particulate matter without
significantly increasing in NOx.
In this paper, butanol effects on combustion process were investigated through conventional methods
and optical diagnostics. First, blends of 80% diesel and 20% n-butanol (BU20) were used in a four cylinder,
turbocharged, water cooled, DI diesel engine, equipped with a common rail injection system. Management
of timing and injection pressure was carried out to achieve conditions in which the almost total
amount of fuel was delivered before auto-ignition. BU20 allowed to attain almost smokeless emissions at
lower injection pressure (100 MPa) than diesel fuel (120 MPa). Smokeless conditions were achieved with
a slight increase in NOx emissions (around 20%) and a minor penalty for the specific fuel consumption.
Afterward, the blends effects on the combustion process were studied in the combustion chamber of a
single cylinder compression ignition engine equipped with the same common rail multi-jets injection
system. Spray combustion and pollutant formation were investigated by UVevisible digital imaging and
natural emission spectroscopy. UVevisible emission spectroscopy was used for the detection of the
chemical markers of combustion process. Chemiluminescence signals, due to OH, HCO and CO2 emission
bands were detected. OH emission was correlated to NOx measured at the exhaust. The soot spectral
feature in the visible wavelength range was related to the engine out soot emissions (literal)
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