A CFD Modelling Approach of Fuel Spray under Initial Non-Reactive Conditions in an Optical Engine

Lis Corral-Gómez, Francisco J. Martos (), Pablo Fernández-Yáñez and Octavio Armas
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Lis Corral-Gómez: Escuela de Ingeniería Industrial y Aeroespacial, Instituto de Investigación Aplicada a la Industria Aeronáutica, Campus de Excelencia Internacional en Energía y Medioambiente, Universidad de Castilla-La Mancha, Av. Carlos III, s/n, 45071 Toledo, Spain
Francisco J. Martos: Escuela de Ingenierías Industriales, Universidad de Málaga, c/Doctor Ortiz Ramos, s/n, 29071 Málaga, Spain
Pablo Fernández-Yáñez: Escuela de Ingeniería Industrial y Aeroespacial, Instituto de Investigación Aplicada a la Industria Aeronáutica, Campus de Excelencia Internacional en Energía y Medioambiente, Universidad de Castilla-La Mancha, Av. Carlos III, s/n, 45071 Toledo, Spain
Octavio Armas: Escuela de Ingeniería Industrial y Aeroespacial, Instituto de Investigación Aplicada a la Industria Aeronáutica, Campus de Excelencia Internacional en Energía y Medioambiente, Universidad de Castilla-La Mancha, Av. Carlos III, s/n, 45071 Toledo, Spain

Energies, 2023, vol. 16, issue 18, 1-16

Abstract: A better understanding of why and how pollutant emissions from compression ignition engines are produced is one of the strategies to reduce them, and to achieve this it is important to understand what happens in the fuel injection inside the combustion chamber and in the combustion process. Experimentally, it is difficult to analyse the fuel spray right at the initial moments when it enters the combustion chamber due to its high velocity. These initial moments of the fuel spray affect its complete development and, consequently, the combustion process inside the chamber. This fact has motivated the approach of this work, in which a parametric study of the spray penetration as a function of variables that can be measured has been proposed. The purpose of this model is to understand which variables of the injection system significantly affect the spray penetration in the initial instants and how they affect it. This study was carried out using diesel and serves as a reference framework for similar studies using pure or blended sustainable advanced fuels. A computational fluid dynamics (CFD) model that determines the spray penetration at initial instants under different injection pressures and nozzle hole diameters is presented in this work. To tune the model, experiments were carried out on an optical engine. The modelled and experimental results exceed 94.8% agreement in all cases studied.

Keywords: optical engine; compression ignition engines; fuel spray; computational fluid dynamics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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