Heptane and Dodecane as surrogates of diesel fuel, a comparison with Computational Fluid Dynamics (CFD)
Palabras clave:
CFD, combustible sustituto, diésel, inyección, chorroResumen
This paper has made a comparative study between two reference fuels such as n-heptane and n-dodecane, both widely used as surrogates for diesel fuel in several studies concerning on injection, combustion and emissions formation in CI engines. In order to achieve this it has been simulated the injection, evaporation and auto ignition of both fuels, using a Computational Fluid Dynamics (CFD) package. Results have been validated with experimental data provided by SANDIA laboratories, conducted at different operating conditions and with different fuels. The comparison is made in terms of typical parameters such as liquid penetration length, the flame lift-off and the ignition delay time.Results indicated that there are a good concordance between CFD simulation and experimentation, when each surrogate fuel is compared. Nevertheless, when they were compared to D2 fuel, the n-heptane was the surrogate that best matched the D2 fuel behavior, in terms of Lift-Off length and ignition delay time.
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