Abstract
This paper presents a semi-analytical analysis for modeling effects ofmoderate turbulence flows on the vaporization of an isolated fuel dropletat ambient room temperature and atmospheric pressure conditions. Theturbulent Nusselt and Sherwood numbers used in this model are purelyempirical. Two different hydrocarbon fuels were tested, i.e. n-heptane,and n-decane each has an initial diameter of 1.5 mm. The dropletReynolds number, Red, is changed in the range (60–500), and turbulenceintensity varied between 0 % and 11 %. The major findings of this studyshowed that the droplet’s vaporization rate, which is deduced from thesteady-state linear variation of the droplet squared diameter, increaseswith increasing turbulence intensity. Also, the results from using severalliquid fuels, i.e. n-hexane, n-heptane, n-octane and n-decane, show thatthe vaporization Damkohler number, Dav, is correlated to nondimensionalturbulence evaporation rate, K/KL, by an exponentialrelation. Also, the applicability of this correlation at high Reynoldsnumbers has been studied.
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