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RESEARCH PAPERS: Internal Combustion Engines: Diesel Engines

Optimum Cylinder Cooling for Advanced Diesel Engines

[+] Author and Article Information
F. Trenc, S. Rodman

Department of Mechanical Engineering, University of Ljubljana, Asuerceva 6, Ljubljana, Slovenia, SLO-1000

L. Skerget, M. Delic

Department of Mechanical Engineering, University of Maribor, Maribor, Slovenia

J. Eng. Gas Turbines Power 120(3), 657-663 (Jul 01, 1998) (7 pages) doi:10.1115/1.2818196 History: Received December 20, 1997; Online November 19, 2007

Abstract

Continuous demand for higher specific engine output simultaneously introduces problems of higher mechanical and thermal stresses of the engine components. Uneven temperature distribution in the cylinder wall of a diesel engine, especially when air-cooled, is well known. Peak local temperatures, large circumferential and longitudinal temperature gradients provoke deformations that, in turn, affect the reliability of the engine. As the result of intensive numerical and experimental investigations, a horizontal, curved channel fed with engine lubrication oil was introduced in the upper part of the air-cooled cylinder. Optimization of the channel design, its position, and determination of suitable asymmetrical split oil flow have led to more favorable cylinder temperature distribution, similar to that obtained by advanced water-cooled engines. Analyses of the local laminar oil-flow phenomena and local heat transfer distribution in curved channels are discussed in the paper and can be successfully applied to advanced liquid-cooled engines.

Copyright © 1998 by The American Society of Mechanical Engineers
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