Visualisation and Thermovision of Fuel Combustion Affecting Heat Release to Reduce NO x and PM Diesel Engine Emissions

Jerzy Cisek, Szymon Leśniak, Andrzej Borowski, Włodzimierz Przybylski and Vitaliy Mokretskyy
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Jerzy Cisek: Faculty of Mechanical Engineering, Cracow University of Technology, 31-155 Kraków, Poland
Szymon Leśniak: Faculty of Mechanical Engineering, Cracow University of Technology, 31-155 Kraków, Poland
Andrzej Borowski: Faculty of Mechanical Engineering, Cracow University of Technology, 31-155 Kraków, Poland
Włodzimierz Przybylski: DAGAS, 05-660 Warka, Poland
Vitaliy Mokretskyy: DAGAS, 05-660 Warka, Poland

Energies, 2022, vol. 15, issue 13, 1-32

Abstract: Research was conducted on fuels with additives that selectively affect the rate of kinetic (dQ k /dα) and diffusion (dQ d /dα) combustion in the diesel engine cylinder. In addition to the base fuel (DFB), DFKA fuel with an additive reducing dQ k /dα, DFDA fuel with an additive increasing dQ d /dα, and DFS fuel with both additives were tested. The main purpose of such dQ/dα course control in the engine cylinder was to simultaneously reduce the emissions of nitrogen oxides (NO x ) and particulate matter (PM), and to increase the efficiency of the combustion process. Similar to the course of the dQ/dα, the course of the combustion temperature (T c (α)) affects the NO x produced and the number of afterburned solid particles; the influence of the fuel additives on the functional curves was analysed. In addition to analysis of the temperature T c (α) calculated from the indicator diagrams, T c (α) analysis was conducted using the two-colour method, which allows the analysis of the isotherm distributions locally and temporarily. The two-colour method required prior endoscopic visualisation of the fast-changing processes inside the engine cylinder. Parameters defined by pressure, temperature, heat release rate, and visualisation and thermovision in the engine cylinder (as a function of the crank angle) allowed for an in-depth cause and effect analysis. It was determined why combustion of DFS fuel with both additives produced a synergy resulting in the simultaneous reduction in NO x and PM emissions in the exhaust gas and an increase in combustion efficiency. This publication relates to the field of Mechanical Engineering.

Keywords: diesel engine; fuel additives; kinetic and diffusion combustion; visualisation; flame temperature; two-colour method; NO x; PM; synergy (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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