Vaporization and pyrolysis modelling of a single droplet of heavy fuel oil using continuous thermodynamics

Garaniya, Vikrambhai ; Goldsworthy, Laurie

ANZIAM Journal, Tome 49 (2007), / Harvested from Australian Mathematical Society

Résumé

This article presents modelling of vaporization and pyrolysis of a single droplet of heavy fuel oil in a high ambient temperature field using the principle of continuous thermodynamics. Continuous thermodynamics reduces the computational simulation load compared with discrete thermodynamics, without compromising the quality of prediction of the complex combustion behaviours of such multicomponent complex fuels. Heavy fuel oil is represented by four fuel fractions and each of these fractions are assigned a separate distribution function. The prediction shows that in the modelling of heavy fuel oil, both heating rate and composition are very important parameters in coke formation. Coke formation can lead to engine degradation and increased exhaust smoke. The developed model shows good agreement with experimental results obtained by other researchers. References Goldsworthy, L., CFD Modelling of residual fuel oil combustion in the context of marine diesel engines. International Journal of Engine Research, 2005, 7: pp. 181--199. Baert, R. S. G., A mathematical model for heavy fuel oil droplet vaporization and pyrolysis in a heavy temperature inert gas. Combustion Science and Technology, 1993, 90: pp. 125--147. Hallett, W. L. H and C. Grimwood. A simple continuous mixture droplet evaporation model with multiple distribution functions. in Combustion Institute, 2001. Canadian Section. Spring Meeting. Hallett, W. L. H., A simple model for the vaporization of droplets with large numbers of components. Combustion and Flame, 2000, 121(1-2): pp. 334--344. doi:10.1016/S0010-2180(99)00144-3 Chen, C. S. and M. M.EI-Wakil, Experimental and theoretical studies of burning drops of hydrocarbon mixtures. Proceedings for Instrumentation and Mechanical Engineers, 1969, 184 (Pt. 3J): pp. 95--108. Ikegami, M., G. Xu, K. Ikeda, S. Honma, H. Nagaishi, D. L. Dietrich, and Y. Takeshita, Distinctive combustion stages of single heavy oil droplet under microgravity. Fuel, 2003, 82(3): pp. 293--304. doi:10.1016/S0016-2361(02)00257-0 Shyu, R. R., C. S. Chen, G. O. Goudie, and M. M. El-Wakil, Multi-component heavy fuel drop histories in a high-temperature flow field. Fuel, 1972, 51(2): pp. 135--145. Tamim, J. and W. L. H. Hallett, A continuous thermodynamics model for multicomponent droplet vaporization. Chemical Engineering Science, 1995, 50(18): pp. 2933--2942. doi:10.1016/0009-2509(95)00131-N Lippert, A. M. and R. D. Reitz. Modelling of multicomponent fuels using continuous distributions with application to droplet evaporation and sprays. in International Fall Fuels and Lubricants Meeting and Explosion. 1997. Tulsa, Oklahoma, 972882. Lippert, A. M., D. W. Stanton, C. J. Rutland, W. L. H. Hallett, and R. D. Reitz, Multidimensional simulation of diesel engine cold start with advanced physical submodels. International Journal of Engine Research, 2000, 1(1): pp. 1--27. Hallett, W. L. H. and N. A. Clark, A model for the evaporation of biomass pyrolysis oil droplets. Fuel, 2006, 85(4): pp. 532--544. doi:10.1016/j.fuel.2005.08.006

Détail

Publié le : 2007-01-01
DOI : https://doi.org/10.21914/anziamj.v49i0.369