Laboratory tests were performed to measure cooling rates of an impinging oil-jet on the underside of an automotive piston as functions of oil nozzle-to-piston surface spacing, oil pressure, oil temperature, and piston temperature. Based on these results, area-average Nusselt number correlations were derived for a Reynolds number range of 100–4500, a Prandtl number range of 90–750, and a nozzle-to-piston surface spacing range over 73–160 mm, which are within the ranges expected for oil-jet cooling of automotive pistons.
An Area-Average Correlation for Oil-Jet Cooling of Automotive Pistons
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received March 22, 2012; final manuscript received March 24, 2014; published online September 30, 2014. Assoc. Editor: Alfonso Ortega.
Easter, J., Jarrett, C., Pespisa, C., Liu, Y. C., Alkidas, A. C., Guessous, L., and Sangeorzan, B. P. (September 30, 2014). "An Area-Average Correlation for Oil-Jet Cooling of Automotive Pistons." ASME. J. Heat Transfer. December 2014; 136(12): 124501. https://doi.org/10.1115/1.4027835
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