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Heat Transfer Research
Fator do impacto: 0.404 FI de cinco anos: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2015008215
pages 71-88

FULL-CYCLE SIMULATION OF DIESEL ENGINE PERFORMANCE WITH THE EFFECT OF HEAT TRANSFER TO THE ENVIRONMENT

Deqi Chen
Key Laboratory of Low-Grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 40044, PR China
Xudong Ye
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, 400044, China
Yiding Cao
Department of Mechanical and Materials Engineering, Florida International University, Miami, Florida 33174

RESUMO

Heat losses to the environment may significantly affect engine performance. To accurately account for the heat-loss effect, engine performance simulation should be carried out based on a complete model which includes all four strokes of an engine cycle. In this paper, a mathematical model that includes the intake stroke, compression stroke, combustion and expansion stroke, and exhaust stroke is presented, which incorporates heat losses to the environment during the four-stroke diesel engine cycle. Through the simulation, the temperature and pressure profiles in the cylinder as well as the engine thermal efficiency are obtained. The profile of heat transfer coefficient is generated, and the effect of heat transfer to the environment on the engine performance is discussed in conjunction with the optimization of the engine performance. As a comprehensive mathematical model for engine simulation, this model is proven to be accurate, convenient, and fast, based on comparisons with available experimental data.


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