THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

External Links

Mehdi Bidabadi

,

Mohammadali Harati

COMBUSTION OF LYCOPODIUM PARTICLES IN RANDOM MEDIA: ANALYTICAL MODEL AND PREDICTING THE EFFECT OF HEAT LOSS AND LEWIS NUMBER

ABSTRACT
In this paper, a new analytical model is proposed to model combustion of micro organic dust particles. In contrast with previous studies, random combustion of lycopodium particles and analyze the effect of heat loss and different Lewis number on the combustion properties is taken which has not be considered before this. It is assumed that flame structure is consisted of a preheat-vaporization zone, a reaction zone and a post flame zone. Then, different Lewis numbers are applied in governing equations. To perform the random model of particle combustion, source term in energy equation has been modeled by means of random states for volatilization of particles in preheat zone. Therefore, different groups which contains random amount of particles and sense a random temperature in the preheat zone has been considered. In this analysis, the impact of random combustion, Lewis number, and particles diameter on the combustion properties of lycopodium particles such as burning velocity, flame temperature and effective equivalence ratio are studied. Consequently, comparison made between results obtained from random model by experimental data, indicated that the random model have a better agreement with experimental data than non-random model.
KEYWORDS
Random Combustion, flame temperature, Burning Velocity, heat loss, organic particles
PAPER SUBMITTED: 2017-10-04
PAPER REVISED: 2018-03-16
PAPER ACCEPTED: 2018-03-27
PUBLISHED ONLINE: 2018-04-28
DOI REFERENCE: https://doi.org/10.2298/TSCI171004107B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 5, PAGES [3175 - 3186]
REFERENCES
  1. Eckhoff, R. K, Dust Explosions in the process Industries, Gulf Professional Publishing, 3rd edition, Boston, (2003)
  2. Dahoe, A. E., Hanjalic, K., Scarlett, B., Determination of the laminar burning velocity and the Markstein length of powder-air flames, Powder Technology, 122(2002), pp. 222-238
  3. Gao, W. et al, Effects of particle characteristics on flame propagation behavior during organic dust explosions in a half-closed chamber, Journal of Loss Prevention in the Process Industries, 25(2012), pp. 993-999.
  4. Sun, J.H., Dobashi, R., Hirano, T., Concentration profile of particles across a flame propagating through an iron particle cloud, combustion and flame, 134(2003), pp. 381-387.
  5. Sun, J.H., Dobashi, R., Hirano, T., Velocity and number density profiles of particles across upward and downward flame propagating through iron particle clouds, Journal of Loss Prevention, 19(2006), pp. 135-141
  6. Proust,C., Flame propagation and combustion in some dust-air mixtures, Journal of Loss Prevention, 19(2006), pp. 89-100.
  7. Proust, C. A, few fundamental aspects about ignition and flame propagation in dust clouds, Journal of Loss Prevention, 19(2006), 104-120
  8. Ross, D. P., Heidenreich, C. A., Zhang, D. K. ,Devolatilisation times of coal particles in a fluidised-bed, Fuel, 79(2000), 873-883,
  9. Han, O. S., Yashima, M., Matsuda, T., Miyake, A., Ogawa, T. A., study of flame propagation mechanisms in lycopodium dust clouds based on dust particles behavior, Journal of Loss Prevention, 14(2001), pp. 153-160.
  10. Kurdyumov, V. N. and Fern´andez-Tarrazo, E., effect on the propagation of premixed laminar flames in narrow open ducts, Combustion Flame, 128(2002), pp. 382-394.
  11. Baghsheikhi, M. et al., The Effect of fuel pyrolysis on the coal particle combustion - an analytical investigation, THERMAL SCIENCE, 20(2016), pp. 279-289.
  12. Shahidi, M. et al., Experimental and numerical investigation on turbulent flow of mwcnt-water nanofluid inside vertical coiled wire inserted tubes, THERMAL SCIENCE, DOI: 10.2298/TSCI151025069S.
  13. Ryu, C. et al., Effect of fuel properties on biomass combustion: Part I. Experiments—fuel type, equivalence ratio and particle size, Fuel, 85(2006), pp. 1039-1046.
  14. Liu, Y., Sun, J., Chen, D., Flame propagation in hybrid mixture of coal dust and methane, Journal of Loss Prevention, 20(2007), pp. 691-697.
  15. Kuo, J.T., Hsi, C. L., Pyrolysis and ignition of single wooden spheres heated in high-temperature streams of air, Combusion and Flame, 142(2005), pp. 401-412.
  16. Bidabadi, M. and Rahbari, A., Modeling combustion of lycopodium particles by considering the temperature difference between the gas and the particles, Combustion, Explosion and Shock Waves, 45(2009), pp. 49-57
  17. Bidabadi, M. Haghiri, A., Rahbari, A., The effect of Lewis and Damköhler numbers on the flame propagation through micro-organic dust particles Int. Journal of Thermal Science, 49(2010), pp. 534-542
  18. Seshardi, K., Berlad, A. L., Tangirala, V., The structure of premixed particle-cloud flames, Combustion Flame, 89(1992), pp. 333-342
PDF VERSION [DOWNLOAD]
Combustion of lycopodium particles in random media: Analytical model and predicting the effect of heat loss and Lewis number

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence