DOI QR코드

DOI QR Code

Study on the Combustion Characteristics of Methanol Fuel Droplet

Methanol 연료 액적의 연소 특성에 관한 연구

  • 서현규 (국립공주대학교 기계자동차공학부)
  • Received : 2014.06.02
  • Accepted : 2014.09.11
  • Published : 2014.09.30

Abstract

The main purpose of this study is to provide basic information of droplet burning, extinction process and flame behavior of methanol fuel and improve the ability of theoretical prediction of these phenomena. For the improved understanding of these phenomena, this paper presents the experimental results on the methanol droplet combustion conducted under various initial droplet diameters ($d_0$), ambient pressure ($P_{amb}$), and oxygen concentration ($O_2$) conditions. To achieve this, the experimental study was conducted in terms of burning rate (K) with normalized droplet diameter ($d/d_0$), flame diameter ($d_f$) and flame standoff ratio (FSR) under the assumptions that the droplet combustion can be described by both the quasi-steady behavior for the region between the droplet surface and the flame interface and the transient behavior for the region between the flame interface and ambient surrounding.

Keywords

References

  1. S. B. Han, S. S. Mun and S. Y. Lee, A study on the smoke reduction of methanol-diesel engine, Transactions of the KSME (B), 20, 2421-2429, 1996.
  2. S. H. Choi, C. H. Ha, C. H. Jeon and Y. J. Chang, An experimental study on the performance and characteristics of emission for an S.I. engine with methanol-reformulated fuel, Transactions of the KSME (B), 25, 1193-1200, 2001.
  3. T. I. Farouk and F. L. Dryer, On the extinction characteristics of alcohol droplet combustion under microgravity conditions - A numerical study, Combustion and Flame, 159, 3208-3223, 2012. https://doi.org/10.1016/j.combustflame.2012.04.005
  4. G. M. Faeth, Current status of droplet and liquid combustion, Progress in Energy and Combustion Science, 3, 191-224, 1977. https://doi.org/10.1016/0360-1285(77)90012-0
  5. F. A. Williams, Droplet burning, in: T. H. Cochran (Eds.), Combustion Experiments in Zero-Gravity Laboratory, Progress in Astronautics and Aeronautics, 73, 31-48, 1981.
  6. C. K. Law, Recent Advances in droplet vaporization and combustion, Progress in Energy and Combustion Science, 8, 171-201, 1982. https://doi.org/10.1016/0360-1285(82)90011-9
  7. C. K. Law and G. M. Faeth, Opportunities and challenges of combustion in microgravity, Progress in Energy and Combustion Science, 20, 65-113, 1994. https://doi.org/10.1016/0360-1285(94)90006-X
  8. A. J. Marchese, F. L. Dryer and V. Nayagam, Numerical modeling of isolated n-alkane droplet flames: initial comparisons with ground and space-based microgravity experiments, Combustion and flame, 116, 432-459, 1999. https://doi.org/10.1016/S0010-2180(98)00109-6
  9. C. K. Law, Unsteady droplet combustion with droplet heating, Combustion and Flame, 26, 17-22, 1976. https://doi.org/10.1016/0010-2180(76)90053-5
  10. S.Y. Cho, R. A. Yetter and F. L. Dryer, A computer model for one-dimensional mass and energy transport in and around chemically reacting particles, including complex gas-phase chemistry, multicomponent molecular diffusion, surface evaporation, and heterogeneous reaction, Journal of Computational Physics, 102, 160-179, 1992. https://doi.org/10.1016/S0021-9991(05)80013-0
  11. S. Y. Cho and F. L. Dryer, A numerical study of the unsteady burning behaviour of n-heptane droplets, Combustion Theory and Modelling, 3, 267-280, 1999. https://doi.org/10.1088/1364-7830/3/2/004
  12. G. M. Faeth, Evaporation and combustion of sprays, Progress in Energy and Combustion Science, 9, 1-76, 1983. https://doi.org/10.1016/0360-1285(83)90005-9
  13. G. A. Godsave, Studies of the combustion of drops in a fuel spray-the burning of single drops of fuel, Proceedings of the Combustion Institute, 4, 818-830, 1953. https://doi.org/10.1016/S0082-0784(53)80107-4
  14. S. Gordon, B. J. McBride, NASA SP-273, 1989.
  15. F. A. Williams and F. L. Dryer, Science Requirements Document for Droplet Combustion Experiment, NASA, 1994.
  16. V. Nayagam, J. B. Haggard, R. Colantonio, A. J. Marchese, B. J. Zhang and F. A. Williams, Microgravity n-Heptane Droplet Combustion in Oxygen-Helium Mixtures at Atmospheric Pressure, AIAA Journal, 26, 1369-1378, 1998.
  17. K. O. Lee, K. Jensen and M. Y. Choi, Investigation of sooting in normal-gravity droplet combustion using light extinction and gravimetric techniques, Proceeding of Combustion Institute, 26, 2397-2404, 1996. https://doi.org/10.1016/S0082-0784(96)80069-5
  18. D. L. Dietrich, J. B. Haggard, F. L. Dryer, V. Nayagam, B. D. Shaw and F. A. Williams, Droplet combustion experiments in spacelab, Proceeding of Combustion Institute, 26, 1201-1207, 1996. https://doi.org/10.1016/S0082-0784(96)80336-5

Cited by

  1. Effect of Initial Diameter on the Soot Generation of Toluene Fuel Droplet vol.20, pp.4, 2015, https://doi.org/10.15435/JILASSKR.2015.20.4.261
  2. Effect of Ambient Conditions on the Soot Generation of Decane Fuel Droplet vol.19, pp.4, 2014, https://doi.org/10.15435/JILASSKR.2014.19.4.211