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Comparative Analysis of a Single Fuel Droplet Evaporation | ||
| Journal of Chemical and Petroleum Engineering | ||
| مقاله 7، دوره 53، شماره 1، شهریور 2019، صفحه 81-90 اصل مقاله (500.88 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jchpe.2019.273934.1264 | ||
| نویسندگان | ||
| Somayeh Jafari؛ Hasan Khaleghi* ؛ Reza Maddahian | ||
| Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran | ||
| چکیده | ||
| In this research, the results of comparative analysis of a single fuel droplet evaporation models are presented. Three well-known evaporation models including Spalding, Borman-Johnson and Abramzon-Sirignano models are analyzed using Computational Fluid Dynamic (CFD). The original Spalding model is extended to consider the effects of the Stefan flow, unsteady vaporization, and variable properties. The evaporation models are validated using already existing experimental data. Numerical results show that the Spalding model overestimates the temperature of the droplet surface in comparison with the other two models, although some modifications were made in the aforementioned model. Our final evaluation concludes that Abramzon-Sirignano model predictions are in good agreement with the experimental data. Therefore, in this paper, this model is used for the parametric study of the effects of droplet size, ambient temperature and pressure on the droplet lifetime and temperature. Results indicate that by increasing the droplet size, the lifetime of the droplets will increase and the steady-state droplet temperature is higher at higher ambient pressures and temperature. | ||
| کلیدواژه‌ها | ||
| Computational Fluid Dynamics؛ Droplet؛ Vaporization | ||
| مراجع | ||
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[1] Alqurashi F. Extension of spray flow modelling using the drop number size distribution moments approach [Doctoral dissertation], University of Manchester; 2015. [2] Abramzon B, Sirignano WA. Droplet vaporization model for spray combustion calculations. International Journal of Heat and Mass Transfer. 1989 Sep 1;32(9):1605-18. [3] Wong SC, Lin AC. Internal temperature distributions of droplets vaporizing in high-temperature convective flows. Journal of Fluid Mechanics. 1992 Apr;237:671-87. [4] Downingm CG. The evaporation of drops of pure liquids at elevated temperatures: Rates of evaporation and wet‐bulb temperatures. AIChE Journal. 1966 Jul;12(4):760-6. [5] Chauveau C, Halter F, Lalonde A, Gökalp I. An experimental study on the droplet vaporization: effects of heat conduction through the support fiber. In 22 nd Annual Conference on Liquid Atomization and Spray Systems (ILASS Europe 2008) 2007. [6] Nomura H, Ujiie Y, Rath HJ, Sato JI, Kono M. Experimental study on high-pressure droplet evaporation using microgravity conditions. InSymposium (International) on Combustion 1996 Jan 1 (Vol. 26, No. 1, pp. 1267-1273). Elsevier. [7] Chauveau C, Birouk M, Gökalp I. Why the d2-law does not hold during droplet vaporization in microgravity conditions. In21st Annual Conference on Liquid Atomization and Spray Systems,(ILASS Europe 2007), Mugla, Turkey 2007. [8] Spalding DB. The combustion of liquid fuels. In Symposium (international) on combustion 1953 Jan 1 (Vol. 4, No. 1, pp. 847-864). Elsevier. [9] Borman GL, Johnson JH. Unsteady vaporization histories and trajectories of fuel drops injected into swirling air. SAE Technical Paper; 1962 Jan 1. [10] Kuo KK. Principles of Combustion, New York: John Wiley & Sons; 1986. [11] Ranz WE, Marshall WR. Evaporation from drops. Chemical Engineering Progress. 1952 Mar;48(3):141-6. [12] Bird RB, Stewart WE, Lightfoot EN. Transport Phenomena, New York: John Wiley & Sons; 1960. [13] Clift R, Grace JR, Weber ME. Bubbles, drops and particles. New York. Dover; 2005. | ||
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