Internal Combustion Engine Heat Transfer and Wall Temperature Modeling: An Overview

Abstract

Internal combustion engines are now extremely optimized, in such ways improving their performance is a costly task. Traditional engine improvement by experimental means is aided by engine thermodynamic models, reducing experimental and total project costs. For those models, accuracy is mandatory in order to offer good prediction of engine performance. Modelling of the heat transfer and wall temperature is an important task concerning the accuracy and the predictions of any engine thermodynamic model, although it is many times an overcome task. In order to perform good prediction of engine heat transfer and wall temperature, models are required for accomplish heat transfer from hot gases to engine parts, heat transfer inside each engine part, and also heat transfer to coolant and lubricating oil. This paper presents an overview about engine heat transfer and wall temperature modelling, with main purpose to aid engine thermodynamic modelling and offer more accurate predictions of engine performance, consumption and emission parameters. The most important correlation are reviewed for three engine heat transfer approaches: gas to wall, wall to wall and wall to liquid heat transfer models. In order to obtain good prediction of wall temperature, those three approaches must be coupled, which may imply convection-conduction-convection problems, although for some applications in diesel engines, radiation problems must be considered.

The Heat Transfer Study in the Diesel Engine Combustion Chamber Using a Two-Zone Combustion Model

“…In diesel engines, the high-burned gas temperature and soot can be considered as the main sources of thermal radiation. Using the relationship of Anands [23], the heat transfer by radiation is calculated as a function of the average temperature of the bulk gases [24]:…”

“…The radiation heat flux is neglected during the intake, compression and exhaust periods. For the combustion period, the formula of Anands has been used [23]:…”

Study of the periodic thermal contact between exhaust valve and its seat in an internal combustion engine

“…Some of the main areas of focus include the use of new materials and lightweight design solutions [24,25,48] optimization of valveseat components, and modeling of heat transfer and combustion processes. Many researchers have used advanced numerical simulations [13], such as finite element analysis and computational fluid dynamics [4], to gain a deeper understanding of the complex phenomena involved in internal combustion engines. Other studies have focused on experimental methods, including testing of different engine configurations and components, in order to validate and refine the numerical models [5].…”

Internal Combustion Engine Based on Particle Swarm Optimization Algorithm

“…In recent years, Chinese car sales kept a high growth rate, but with the continuous use of vehicles and other means of transportation, the resulting environmental and energy problems are outstanding [1][2]. In terms of the environment, currently existing vehicles mainly use hydrocarbon fuel combustion to obtain the energy needed to drive the car.…”