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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/73625

    Título
    Analysis of the combustion speed in a spark ignition engine fuelled with hydrogen and gasoline blends at different air fuel ratios
    Autor
    Gabana Molina, PedroAutoridad UVA Orcid
    Giménez Olavarría, BlancaAutoridad UVA Orcid
    Martín Herreros, José
    Tsolakis, Athanasios
    Año del Documento
    2025
    Descripción
    Producción Científica
    Documento Fuente
    Fuel, febrero 2025, vol. 381(C), 133563
    Abstract
    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.
    Materias Unesco
    3322.05 Fuentes no Convencionales de Energía
    3313.13 Motores de Combustión Interna (General)
    Palabras Clave
    Hydrogen-Gasoline combustion
    Quasi-dimensional combustion diagnosis
    Turbulent combustion speed
    Premixed combustion
    Combustion speed analysis
    Expansion speed
    ISSN
    0016-2361
    Revisión por pares
    SI
    DOI
    10.1016/j.fuel.2024.133563
    Patrocinador
    Ministero de Ciencia e Innovación (PID2019-106957RB-C22)
    Engineer and Physical Sciencies Research Council (EPSRC) (EP/W016656/1)
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S0016236124027121
    Propietario de los Derechos
    © 2024 The Authors
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/73625
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP46 - Artículos de revista [100]
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    Universidad de Valladolid

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