Internal Combustion Engine Heat Transfer and Wall Temperature Modeling: An Overview
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ORIGINAL PAPER
Internal Combustion Engine Heat Transfer and Wall Temperature Modeling: An Overview Leonardo Fonseca1,3 · Pablo Olmeda2 · Ricardo Novella2 · Ramon Molina Valle1 Received: 30 April 2019 / Accepted: 30 September 2019 © CIMNE, Barcelona, Spain 2019
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 convectionconduction-convection problems, although for some applications in diesel engines, radiation problems must be considered. Keywords Internal combustion engine · Engine wall temperature modeling · Engine heat transfer modelling · Engine thermodynamic modelling
1 Introduction The global awareness towards the greenhouse gases emissions has led to a more stringent Internal Combustion Engine (ICE) emissions legislation, thus focusing the automotive researchers and manufacturers attention on the development The author Leonardo Fonseca acknowledges CAPES (Coordination for the Improvement of Higher Education Personnel) for the scholarship from the program “CAPES DEMANDA SOCIAL”, Ph.D. level. * Leonardo Fonseca [email protected] 1
PPGMEC/UFMG - Mechanical Engineering Post Graduation Program - Federal University of Minas Gerais, 6627 Antonio Carlos Av., Belo Horizonte 31270‑901, Brazil
2
CMT Motores Termicos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
3
DETEM/UFSJ - Telecommunications and Mechatronic Engineering Department - Federal University of São João del-Rei, MG 443, km 7, Ouro Branco 36420‑000, Brazil
of cleaner and more efficient powertrains [1]. After decades of optimization research and design, Internal Combustion Engine (ICE) are now extremely optimized, in such a manner that improving their performance is really difficult. Experimental research has always been the main option in engine deve
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