Abstract
The thermal-physical properties of multi-walled carbon nanotubes (MCNTs) and MCNT blended diesel fuel were analyzed. Internal flow in injector Spray A of Engine Combustion Network and spray in a constant-volume chamber with considering the effect of the turbulence-induced breakup were modeled for pure diesel fuel and MCNT blended diesel fuel. Nozzle flow simulation showed that the addition of MCNTs into diesel fuel increased the flow turbulence at the nozzle hole outlet. Spray simulation statistically coupled with nozzle flow modeling showed that during stable spray development, there were a positive linear relationship between the liquid penetration length and the MCNT content in diesel fuel and a negative linear relationship between the Sauter mean diameter of the droplets and the MCNT content; the addition of MCNTs reduced the liquid cone angle and had an insignificant influence on the vapor penetration length.
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