Heptano y Dodecano como sustitutos del combustible diesel, una comparación mediante Fluido-Dinámica Computacional (CFD)
Keywords:
CFD solver, surrogate fuel, diesel fuel, injection, sprayAbstract
En este trabajo se ha efectuado un estudio comparativo entre dos combustibles de referencia como el n-heptano y el n-dodecano, ambos ampliamente utilizados como sustitutos del combustible diesel, en diversos estudios sobre inyección combustión y formación de emisiones contaminantes en motores diesel. Para ello se ha simulado la inyección evaporación y auto ignición de los combustibles mencionados utilizando un paquete de Fluido-Dinámica Computacional (CFD). Los resultados se han validado con información experimental proporcionada por los laboratorios SANDIA, llevados a cabo a diferentes condiciones operativas y con diferentes combustibles. La comparación se ha hecho en términos de parámetros típicos como la longitud de penetración, el lift-off de la llama y el retraso a la ignición.
Los resultados indican que hay una buena concordancia entre la simulación CFD y los datos experimentales, al comparar cada combustible sustituto. Sin embargo, al hacer la comparación con el diesel, el n-heptano fue el combustible sustituto que presentó un comportamiento más cercano al diesel, en términos del lift-Off y del retraso a la ignición.
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