RT info:eu-repo/semantics/article
T1 Analysis of the combustion speed in a spark ignition engine fuelled with hydrogen and gasoline blends at different air fuel ratios
A1 Gabana Molina, Pedro
A1 Giménez Olavarría, Blanca
A1 Martín Herreros, José
A1 Tsolakis, Athanasios
K1 Hydrogen-Gasoline combustion
K1 Quasi-dimensional combustion diagnosis
K1 Turbulent combustion speed
K1 Premixed combustion
K1 Combustion speed analysis
K1 Expansion speed
K1 3322.05 Fuentes no Convencionales de Energía
K1 3313.13 Motores de Combustión Interna (General)
AB The use of hydrogen in internal combustion engines is a promising solution for the decarbonisation of the transport sector. The current transition scenario is marked by the unavailability and storage challenges of hydrogen. Dual fuel combustion of hydrogen and gasoline in current spark ignition engines is a feasible solution in the short and medium term as it can improve engine efficiency, reduce pollutant emissions and contribute significantly in tank to wheel decarbonisation without major engine modification. However, new research is needed to understand how the incorporation of hydrogen affects existing engines to effectively implement gasoline-hydrogen dual fuel option. Understanding the impact of hydrogen on the combustion process (e.g. combustion speed) will guide and optimize the operation of engines under dual fuel combustion conditions.In this work, a commercial gasoline direct injection engine has been modified to operate with gasoline-hydrogen fuels. The experiments have been carried out at various air–fuel ratios ranging from stoichiometric to lean combustion conditions at constant engine speed and torque. At each one of the 14 experimental points, 200-cycle in-cylinder pressure traces were recorded and processed with a quasi-dimensional diagnostic model and a combustion speed analysis was then carried out. It has been understood that hydrogen mainly reduces the duration of the first combustion phase. Hydrogen also enables to increase air excess ratios (lean in fuel combustion) without significantly increasing combustion duration.Furthermore, a correlation is proposed to predict combustion speed as a function of the fuel and air mixture properties. This correlation can be incorporated to calculate combustion duration in predictive models of engines operating under different fuel mixtures and different geometries of the combustion chamber with pent-roof cylinder head and flat piston head.
SN 0016-2361
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/73625
UL https://uvadoc.uva.es/handle/10324/73625
LA eng
NO Fuel, febrero 2025, vol. 381(C), 133563
NO Producción Científica
DS UVaDOC
RD 15-ene-2025