Effect of heat transfer space non-uniformity of combustion chamber components on in-cylinder soot emission formation in diesel engine |
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Authors: | L Ji-zu BAI Min-li LI Xiao-jie ZHOU Long |
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Affiliation: | (1) Ruhstorf, Germany;(2) Deutz AG, K?ln, Germany;(3) MAN Diesel & Turbo SE, Augsburg, Germany;(4) W?rtsil? Switzerland Ltd, Winterthur, Switzerland; |
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Abstract: | Combustion chamber components (cylinder head, cylinder liner, piston assembly and oil film) are treated as a coupled body.
Based on the three-dimensional numerical simulation of heat transfer of the coupled body, a coupled three-dimensional calculation
model for the in-cylinder working process and the combustion chamber components was built with domain decomposition and boundary
coupling method, in which the coupled three-dimensional simulation of in-cylinder working process and the combustion chamber
components was adopted. The simulation was applied in the influence investigation of the space non-uniformity in heat transfer
among combustion chamber components on the generation of in-cylinder emissions. The results show that the space non-uniformity
in heat transfer among the combustion chamber components has great influence on the generation of in-cylinder NO
x
emissions. The heat transfer space non-uniformity of combustion chamber components has little effect on soot formation, and
far less effect on soot formation than on NO
x
. Under two situations of different wall temperature distributions, the soot in cylinder is different by 1.3% when exhaust
valves are open. |
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Keywords: | heat transfer space non-uniformity soot emission in-cylinder diesel |
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