The Influence of Hydrogen on Vaporization, Mixture Formation and Combustion of Diesel Fuel at an Automotive Diesel Engine

Alexandru Cernat, Constantin Pana, Niculae Negurescu, Gheorghe Lazaroiu and Cristian Nutu
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Alexandru Cernat: Department of Thermotechnics, Engines, Thermal and Frigorific Equipment, University Politehnica of Bucharest, 060042 București, Romania
Constantin Pana: Department of Thermotechnics, Engines, Thermal and Frigorific Equipment, University Politehnica of Bucharest, 060042 București, Romania
Niculae Negurescu: Department of Thermotechnics, Engines, Thermal and Frigorific Equipment, University Politehnica of Bucharest, 060042 București, Romania
Gheorghe Lazaroiu: Department of Energy Generation and Use, University Politehnica of Bucharest, 060042 București, Romania
Cristian Nutu: Department of Thermotechnics, Engines, Thermal and Frigorific Equipment, University Politehnica of Bucharest, 060042 București, Romania

Sustainability, 2020, vol. 13, issue 1, 1-16

Abstract: Hydrogen can be a viable alternative fuel for modern diesel engines, offering benefits on efficiency and performance improvement. The paper analyses the results of a thermodynamic model developed by authors in order to study the influence of Hydrogen addition on a process like vaporization, mixture forming, and combustion at the level of diesel fuel droplets. The bi-zonal model is applied for a dual-fueled diesel engine K9K type designed by Renault for automotives. For the engine operating regime of 2000 rpm speed and 55% engine load, the diesel fuel is partially substituted by Hydrogen in energetic percents of 6.76%, 13.39%, and 20.97%, the engine power being maintained at the same level comparative to classic fueling. At Hydrogen addition, the diesel fuel jets atomization and diesel fuel droplets vaporization are accelerated, the speed of formation of the mixture being increased. Comparative to classic fueling, the use of Hydrogen leads to diesel droplets combustion intensification, with a shortened autoignition delay, reduction of combustion duration, and increase of flame radius.

Keywords: vaporization; mixture; combustion; flame; diesel engine; hydrogen fuel; diesel fuel droplet (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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