Modelado multidimensional de chorro Diesel
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2015-07-07
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Jaén: Universidad de Jaén
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[ES] El presente trabajo se ha querido desarrollar una metodología general para el estudio y caracterización del chorro Diesel evaporativo, implementando un modelo multidimensional CFD con el software libre OpenFOAM, y utilizando medidas experimentales como parámetros de entrada: levantamiento de aguja, presión de inyección, y presión en la cámara de combustión. Para ello se ha realizado previamente una descripción sobre los diferentes sistemas y tipologías de inyección de combustible; además de los parámetros característicos que definen el flujo en el interior de las toberas y posterior formación de la mezcla aire-combustible. Posteriormente se han configurado dos modelos multidimensionales: uno para considerar el fenómeno de la cavitación, y otro para la formación de la mezcla
aire-combustible. Y para finalizar se ha realizado un post-procesamiento del cálculo computacional llevado a cabo para obtener parámetros característicos como flujo de masa inyectada ,flujo de momento, coeficientes de descarga, penetración del chorro, etc.
[EN] This paper aims to develop a general methodology far the study and characterization of evaporative spray Diesel, implementing a multidimensional CFD modelling with free software OpenFOAM, and using experimental measurements as input parameters: needle lift, injection pressure, and pressure in the combustion chamber. lt was performed a description of the different systems and types of fuel injection besides the characteristic parameters which define the flow inside the nozzles and subsequent formation of the air-fuel mixture. Subsequently it has been configured two multidimensional and transient numerical modelling: one of then to consider the phenomenon of cavitation, and another modelling to describe the formation of the air-fuel mixture. And finally it has performed a computational post-processing to obtain characteristic parameters as mass flow injected, spray momentum,discharge coefficients, spray penetration, etc.
[EN] This paper aims to develop a general methodology far the study and characterization of evaporative spray Diesel, implementing a multidimensional CFD modelling with free software OpenFOAM, and using experimental measurements as input parameters: needle lift, injection pressure, and pressure in the combustion chamber. lt was performed a description of the different systems and types of fuel injection besides the characteristic parameters which define the flow inside the nozzles and subsequent formation of the air-fuel mixture. Subsequently it has been configured two multidimensional and transient numerical modelling: one of then to consider the phenomenon of cavitation, and another modelling to describe the formation of the air-fuel mixture. And finally it has performed a computational post-processing to obtain characteristic parameters as mass flow injected, spray momentum,discharge coefficients, spray penetration, etc.
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Instalaciones Térmicas y de Fluidos