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자료유형
학술저널
저자정보
저널정보
한국자동차공학회 오토저널 자동차공학회지 제2권 제1호
발행연도
1980.7
수록면
39 - 50 (12page)

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This paper presents the variations obtained in heat flow rate and engine performance of a four-stroke cycle Diesel engine when there were changes in the temperature of cooling water, compression ratio, injection timing of fuel, and other factors.
Heat dissipation of engine cylinder was calculated by the heat transfer coefficient of Nusselt'sempirical equation and the analysis of distribution of temperature in cylinder barrel was ob- tained by the finite element method of two-dimensional steady state heat conduction.
In this experiment, the outside temperature of cylinder liner was measured by the data log-ger, and the temperature distribution of liner was computed by the analysis of triangular fini-te element model under the assumption due to surface heat flux of cylinder inner surface.
The results obtained by this study are as follows.
Under the given operating condition, the temperature distribution of cylinder liner by using
finite element method shows that the mean temperature of barrel is in accordance with the ex-perimental results of Eichelberg and temperature difference is lower than 4.23℃.
The heat dissipation of engine decrease in accordance with the decrease of piston mean vel-
ocity, compression ratio, and the increase of coolant temperature.
Influence on the delay of injection timing of fuel brings about the decrease of heat rejection
over the cylinder at constant test conditions.

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Abstract

Ⅰ.序論

Ⅱ.디이젤機關의 放熱解析

Ⅲ.實驗裝置 및 實驗方法

Ⅳ.實驗結果 및 考察

Ⅴ.結論

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