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Article

Experimental Study of the Effect of Hydrotreated Vegetable Oil and Oxymethylene Ethers on Main Spray and Combustion Characteristics under Engine Combustion Network Spray A Conditions

1
CMT–Motores Térmicos/Universitat Politècnica de València, Camino de Vera s/n. 46022 Valencia, Spain
2
Universidad de Castilla-La Mancha, Campus de Excelencia Internacional en Energía y Medioambiente, Escuela de Ingeniería Industrial y Aeroespacial de Toledo, Real Fábrica de Armas. Edificio Sabatini. Av. Carlos III, s/n, 45071 Toledo, Spain
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(16), 5460; https://doi.org/10.3390/app10165460
Received: 14 July 2020 / Revised: 31 July 2020 / Accepted: 2 August 2020 / Published: 7 August 2020
The stringent emission regulations have motivated the development of cleaner fuels as diesel surrogates. However, their different physical-chemical properties make the study of their behavior in compression ignition engines essential. In this sense, optical techniques are a very effective tool for determining the spray evolution and combustion characteristics occurring in the combustion chamber. In this work, quantitative parameters describing the evolution of diesel-like sprays such as liquid length, spray penetration, ignition delay, lift-off length and flame penetration as well as the soot formation were tested in a constant high pressure and high temperature installation using schlieren, OH∗ chemiluminescence and diffused back-illumination extinction imaging techniques. Boundary conditions such as rail pressure, chamber density and temperature were defined using guidelines from the Engine Combustion Network (ECN). Two paraffinic fuels (dodecane and a renewable hydrotreated vegetable oil (HVO)) and two oxygenated fuels (methylal identified as OME1 and a blend of oxymethylene ethers, identified as OMEx) were tested and compared to a conventional diesel fuel used as reference. Results showed that paraffinic fuels and OMEx sprays have similar behavior in terms of global combustion metrics. In the case of OME1, a shorter liquid length, but longer ignition delay time and flame lift-off length were observed. However, in terms of soot formation, a big difference between paraffinic and oxygenated fuels could be appreciated. While paraffinic fuels did not show any significant decrease of soot formation when compared to diesel fuel, soot formed by OME1 and OMEx was below the detection threshold in all tested conditions. View Full-Text
Keywords: hydrotreated vegetal oil; oxymethylene ethers; ignition delay; liquid length; lift-off length; soot hydrotreated vegetal oil; oxymethylene ethers; ignition delay; liquid length; lift-off length; soot
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MDPI and ACS Style

Pastor, J.V.; García-Oliver, J.M.; Micó, C.; García-Carrero, A.A.; Gómez, A. Experimental Study of the Effect of Hydrotreated Vegetable Oil and Oxymethylene Ethers on Main Spray and Combustion Characteristics under Engine Combustion Network Spray A Conditions. Appl. Sci. 2020, 10, 5460. https://doi.org/10.3390/app10165460

AMA Style

Pastor JV, García-Oliver JM, Micó C, García-Carrero AA, Gómez A. Experimental Study of the Effect of Hydrotreated Vegetable Oil and Oxymethylene Ethers on Main Spray and Combustion Characteristics under Engine Combustion Network Spray A Conditions. Applied Sciences. 2020; 10(16):5460. https://doi.org/10.3390/app10165460

Chicago/Turabian Style

Pastor, José V., José M. García-Oliver, Carlos Micó, Alba A. García-Carrero, and Arantzazu Gómez. 2020. "Experimental Study of the Effect of Hydrotreated Vegetable Oil and Oxymethylene Ethers on Main Spray and Combustion Characteristics under Engine Combustion Network Spray A Conditions" Applied Sciences 10, no. 16: 5460. https://doi.org/10.3390/app10165460

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