U.S. Army Workshop on Low Heat Rejection Engines (4th). Summary of Main Presentations Programme.

摘要

The paper describes the basic principles underlying the operation of low heat loss engines, and the magnitude of the efficiency improvements which are theoretically achievable. The effect of varying degrees of thermal insulation on various operating parameters is examined in some detail, as is the relationship between degree of insulation and ceramic coating thickness. The effect on ceramic materials of severe surface temperature oscillations and the resultant thermal stress gradients is also discussed. In the following section, the paper describes methods of construction adopted both for ceramic inserts and coatings, and rig tests for the assessment of thermal fatigue under both load and firing cycling. The paper does not attempt to draw any general conclusions. Keywords: Ceramics; Internal combustion engines. (KT)