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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/73950

    Título
    A correlation for turbulent combustion speed accounting for instabilities and expansion speed in a hydrogen-natural gas spark ignition engine
    Autor
    Giménez Olavarría, BlancaAutoridad UVA Orcid
    Melgar Bachiller, AndrésAutoridad UVA Orcid
    Horrillo Güemes, Alfonso JesúsAutoridad UVA
    Tinaut Fluixá, Francisco VicenteAutoridad UVA Orcid
    Año del Documento
    2021
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Combustion and Flame, 2021, vol. 223, p 15-27
    Abstract
    An analysis of the turbulent premixed combustion speed in an internal combustion engine using natural gas, hydrogen and intermediate mixtures as fuels is carried out, with different air-fuel ratios and engine speeds. The combustion speed has been calculated by means of a two-zone diagnosis thermodynamic model combined with a geometric model using a spherical flame front hypothesis. 48 operating condi- tions have been analyzed. At each test point, the pressure record of 200 cycles has been processed to calculate the cycle averaged turbulent combustion speed for each flame front radius. An expression of turbulent combustion speed has been established as a function of two parameters: the ratio between turbulence intensity and laminar combustion speed and the second parameter, the ratio between the in- tegral spatial scale and the thickness of the laminar flame front increased by instabilities. The conclusion of this initial study is that the position of the flame front has a great influence on the expression to calculate the combustion speed. A unified correlation for all positions of the flame front has been ob- tained by adding one correction term based on the expansion speed as a turbulence source. This unified correlation is thus valid for all experimental conditions of fuel types, air–fuel ratios, engine speeds, and flame front positions. The correlation can be used in quasi-dimensional predictive models to determine the heat released in an ICE.
    Palabras Clave
    Quasi-dimensional combustion diagnosis
    Turbulent combustion speed
    Natural gas –hydrogen mixtures
    Premixed combustion
    Internal combustion engine
    Instabilities
    Expansion speed
    ISSN
    0010-2180
    Revisión por pares
    SI
    DOI
    10.1016/j.combustflame.2020.09.026
    Patrocinador
    ENE 2012-34830 (con fondos FEDER) de Ministerior de Ciencia y Tecnología de España y financiación a grupos d eexcelencia GR203 del Gobierno de Castilla y León and the Regional Government of Castile and Leon for funding the Excel- lence Research Group GR203
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S0010218020304107?via%3Dihub
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/73950
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP46 - Artículos de revista [100]
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