THERMAL SCIENCE

International Scientific Journal

Ali Akbar Ranjbar

,

Kurosh Sedighi

,

Mousa Farhadi

,

Mohsen Pourfallah

COMPUTATIONAL STUDY OF THE EFFECT OF DIFFERENT INJECTION ANGLE ON HEAVY DUTY DIESEL ENGINE COMBUSTION

ABSTRACT
Diesel engines exhausting gaseous emission and particulate matter have long been regarded as one of the major air pollution sources, particularly in metropolitan areas, and have been a source of serious public concern for a long time. The choosing various injection strategies is not only motivated by cost reduction but is also one of the potentially effective techniques to reduce exhaust emission from diesel engines. The purpose of this study is to investigate the effect of different injection angles on a heavy duty diesel engine and emission characteristics. The varieties of injection angle were simulated and the emissions like soot and NO is calculated. The comparison between the different injection strategies was also investigated. A combustion chamber for three injection strategies (injection direction with angles of α=67.5, 70, and 72.5 degree) was simulated. The comparative study involving rate of heat release, in-cylinder temperature, in-cylinder pressure, NO and soot emissions were also reported for different injection strategies. The case of α=70 is optimum because in this manner the emissions are lower in almost most of crank angle than two other cases and the in-cylinder pressure, which is a representation of engine power, is higher than in the case of α=67.5 and just a little lower than in the case of α=72.5.
KEYWORDS
diesel engine, injection angle, heat release, meanmass fraction, mean soot mass fraction
PAPER SUBMITTED: 2008-09-17
PAPER REVISED: 2009-02-28
PAPER ACCEPTED: 2009-03-26
DOI REFERENCE: https://doi.org/10.2298/TSCI0903009R
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2009, VOLUME 13, ISSUE Issue 3, PAGES [9 - 21]
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Computational study of the effect of different injection angle on heavy duty diesel engine combustion

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