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Spectral properties of diesel fuel droplets |
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| Authors: | L.A. Dombrovsky S.V. Mikhalovsky M.R. Heikal |
| Affiliation: | a Heat Transfer Department, Institute for High Temperatures of the Russian Academy of Sciences, Krasnokazarmennaya 17A, Moscow 111250, Russian Federation b Faculty of Science and Engineering, School of Engineering, University of Brighton, Cockroft Building, Lewes Road, Brighton BN2 4GJ, UK c School of Pharmacy and Biomolecular Sciences, University of Brighton, Cockroft Building, Lewes Road, Brighton BN2 4GJ, UK |
| Abstract: | Absorption spectra of several types of diesel fuel are studied experimentally. Index of refraction of these fuels is calculated using subtractive Kramers-Krönig analysis. The ageing process of fuels is simulated by prolonged boiling. Radiative properties of diesel fuel droplets are calculated using the Mie theory and a simplified approach, based on approximations of absorption and scattering efficiency factors. It is pointed out that the accuracy of the simplified approach is sufficient for practical applications in the visible and infrared ranges, for various types of diesel fuel, and for droplet radii in the range from 5 to 50 μm. The monodisperse approximation is shown to be applicable for the analysis of infrared radiative properties of realistic polydisperse diesel fuel sprays. |
| Keywords: | Diesel engines Fuel droplets Thermal radiation Absorption Scattering |
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