Absorption of thermal radiation in a semi-transparent spherical droplet: a simplified model
- 16 June 2003
- journal article
- research article
- Published by Elsevier BV in International Journal of Heat and Fluid Flow
- Vol. 24 (6), 919-927
- https://doi.org/10.1016/s0142-727x(03)00084-5
Abstract
The boundary-value problem for calculation of differential absorption of thermal radiation is formulated based on the modified DP0 approximation. The solution of this problem is supplemented by simple analytical approximations for the normalised absorbed radiation power. The latter is used together with the analytical approximation for the efficiency factor of absorption, suggested earlier. The resulting simplified model is applied to the specific problem of absorption of thermal radiation by a diesel fuel droplet. Two types of diesel fuel have been considered. It is pointed out that the radial distribution of absorbed thermal radiation power is non-monotonic. The power absorbed in the droplet core is shown to be rather large and almost homogeneous. Also, the absorbed power is large in the vicinity of the droplet surface, but is minimal in the intermediate region. It is pointed out that the variations of the refractive index of diesel fuel with wavelengths can smooth the predicted radial dependence of the thermal radiation power, absorbed in diesel fuel droplets.Keywords
This publication has 20 references indexed in Scilit:
- Spectral properties of diesel fuel dropletsFuel, 2003
- A modified differential approximation for thermal radiation of semitransparent nonisothermal particles: application to optical diagnostics of plasma sprayingJournal of Quantitative Spectroscopy and Radiative Transfer, 2002
- Spectral Model of Absorption and Scattering of Thermal Radiation by Diesel Fuel DropletsHigh Temperature, 2002
- Heating and evaporation of semi-transparent diesel fuel droplets in the presence of thermal radiationFuel, 2001
- Thermal radiation from nonisothermal spherical particles of a semitransparent materialInternational Journal of Heat and Mass Transfer, 2000
- A finite conductivity model for diesel spray evaporation computationsInternational Journal of Heat and Fluid Flow, 1999
- Diesel Combustion: An Integrated View Combining Laser Diagnostics, Chemical Kinetics, And Empirical ValidationSAE International Journal of Advances and Current Practices in Mobility, 1999
- TRANSIENT 3D ANALYSIS OF A Dl GASOLINE INJECTOR SPRAYAtomization and Sprays, 1999
- A review of spray ignition phenomena: Present status and future researchProgress in Energy and Combustion Science, 1998
- Modified Kramers–Kronig Analysis of Optical SpectraJournal of the Optical Society of America, 1971