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Wyświetlanie 1-2 z 2
Tytuł:
Relations between ion signal and flame propagation in cylinder of a rapid compression machine
Autorzy:
Fiedkiewicz, Łukasz
Pielecha, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/133907.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
ion current
flame speed
high speed camera
rapid compression machine
prąd jonowy
prędkość płomienia
szybka kamera wideo
maszyna pojedynczego sprężu
Opis:
Internal combustion engine diagnostics using traditional methods of cylinder pressure signal processing limits the amount of information available about the combustion process. It is necessary to conduct research in order to obtain more precise information - in-creasing the combustion process diagnosis potential. One such suggestion is the use of an ionization signal and an attempt to link it to the flame development during combustion of gaseous fuels. The article attempts to identify such a relationship using a rapid compression machine due to optical access it provides to the combustion chamber. As a result of the research, the relationships between the ionization voltage (chemical and thermal) of the first combustion phase and the corresponding flame development rates were determined. A relatively high coefficient of determination value was obtained for both relations, which indicates the possibility of obtaining diagnostic information about the combustion process from the ionization signal.
Źródło:
Combustion Engines; 2019, 58, 4; 264-268
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of flame temperature and soot amount for effective NOx and PM reduction in a heavy duty diesel engine
Autorzy:
Aoyagi, Yuzo
Powiązania:
https://bibliotekanauki.pl/articles/132846.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
Diesel engine
exhaust emissions
NOx
PM
EGR
BSFC
flame temperature
two-color method
video camera
silnik Diesla
emisje spalin
temperatura płomienia
metoda dwubarwowa
kamera wideo
Opis:
To reduce exhaust NOx and smoke, it is important to measure flame temperature and soot amount in combustion chamber. In diesel combustion it is effective to use the two-color method for the measurement of the flame temperature and KL factor, which is related with soot concentration. The diesel flame was directly and continuously observed from the combustion chamber at running engine condition by using a bore scope and a high-speed video camera. The experimental single cylinder engine has 2.0-liter displacement and has the ability with up to five times of the boost pressure than the naturally aspirated engine by external super-charger. The devices of High Boost, Wide Range and High EGR rate at keeping a relatively high excess air ratio were installed in this research engine in order to reduce exhaust NOx emission without smoke deterioration from diesel engines. The video camera nac GX-1 was used in this study. From observed data under the changing EGR rates, the flame temperature and KL factor were obtained by the software of two-color method analysis. The diesel combustion processes are understood well by analyzing high-speed movies of the diesel flame motion and its temperature. The NOx and smoke are mutually related to maximum flame temperature and also it is possible to reduce simultaneously both NOx and soot emissions by high EGR rate in a single cylinder diesel engine.
Źródło:
Combustion Engines; 2019, 58, 4; 32-39
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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