THERMAL SCIENCE

International Scientific Journal

EFFECT OF COMBUSTION CHAMBER GEOMETRY ON PERFORMANCE, COMBUSTION, AND EMISSION OF DIRECT INJECTION DIESEL ENGINE WITH ETHANOL-DIESEL BLEND

ABSTRACT
In the present paper, the effect of combustion chamber geometry on performance, combustion and emissions of ethanol-diesel blend operated in direct injection Diesel engine is discussed. The main air motions are generated in the cylinder by the intake - induced swirl, the piston motion, and its geometry. The piston bowl is modified from traditional hemispherical combustion chamber to the toroidal (re-en-trant) combustion chamber and operated with Neat diesel and 40% ethanol diesel blend to improve better evaporation and mixing during the compression stroke on a single cylinder Diesel engine. It is found that the toroidal combustion chamber creates better turbulence, squish, and swirl at high compression ratios of 19.5:1 compared to that of traditional one. Further, the combustion is significantly enhanced due to increased swirl. It is concluded that the brake thermal efficiency for toroidal combustion chamber is 33% and the peak pressure in the cylinder as well as peak heat release rate is also increased. Further, it is also concluded that 60% of CO emission, 20% of HC emission, 40% of NOx emission, and 90% in smoke emissions were reduced for toroidal combustion chamber, compared to that of hemispherical combustion chamber. This article has been corrected. Link to the correction 10.2298/TSCI161104279E
KEYWORDS
PAPER SUBMITTED: 2015-09-16
PAPER REVISED: 2016-01-12
PAPER ACCEPTED: 2016-02-04
PUBLISHED ONLINE: 2016-11-13
DOI REFERENCE: https://doi.org/10.2298/TSCI16S4937G
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Supplement 4, PAGES [S937 - S946]
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© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence