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Title: Optimum cylinder cooling for advanced diesel engines

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 can be successfully and effectively applied to advanced liquid-cooled engines.
Authors:
;  [1] ; ;  [2]
  1. Univ. of Ljubljana (Slovenia). Dept. of Mechanical Engineering
  2. Univ. of Maribor (Slovenia). Dept. of Mechanical Engineering
Publication Date:
OSTI Identifier:
538103
Report Number(s):
CONF-9610275--
ISBN 0-7918-1516-1; TRN: IM9746%%28
Resource Type:
Conference
Resource Relation:
Conference: 18. annual fall technical conference of the ASME Internal Combustion Engine Division, Fairborn, OH (United States), 20-23 Oct 1996; Other Information: PBD: 1996; Related Information: Is Part Of Advanced designs and operations: Volume 1. Proceedings of the 18. annual fall technical conference of the ASME Internal Combustion Engine Division; ICE-Volume 27-1; Caton, J.A. [ed.] [Texas A and M Univ., College Station, TX (United States)]; PB: 116 p.
Publisher:
American Society of Mechanical Engineers, New York, NY (United States)
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; DIESEL ENGINES; COOLING SYSTEMS; THERMAL STRESSES; RELIABILITY; LUBRICATING OILS; TEMPERATURE DISTRIBUTION