THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

External Links

Guoxun Jing

,

Shaoshuai Guo

,

Yulou Wu

INVESTIGATION ON THE CHARACTERISTICS OF SINGLE-PHASE GAS EXPLOSION AND GAS-COAL DUST COUPLING EXPLOSION IN BIFURCATED TUBES

ABSTRACT
In order to deeply understand the overpressure propagation characteristics of explosion shock wave of single-phase gas explosion and gas-coal dust coupling explosion in bifurcated tube, this paper makes a comprehensive and in-depth study on the change and distribution law of explosion shock wave overpressure of single-phase gas explosion and gas-coal dust coupling explosion in bifurcated tube by means of experimental research, the results show that: the explosion shock wave overpressure of single-phase gas explosion and gas-coal dust coupling explosion is all affected by the bifurcation angle of the tube, the larger the bifurcation angle of the tube is, and the greater the explosion shock wave overpressure is. In terms of explosion shock wave overpressure distribution, single-phase gas explosion and gas-coal dust coupling explosion show a similar overall development trend, and the maximum explosion shock wave overpressure is obtained in front of the bifurcation point. The mutation coefficients of explosion shock wave overpressure of single-phase gas explosion and gas-coal dust coupling explosion before and after the bifurcation point of the tube are all affected by the bifurcation angle of the tube. In the straight tube section, the mutation coefficient of explosion shock wave overpressure increases gradually with the increase of the bifurcation angle of the tube, while the situation in the inclined tube section is just the opposite. Under the condition of the same bifurcation angle, the shock wave overpressure mutation coefficient of gas-coal dust coupling explosion is smaller than that of single-phase gas explosion.
KEYWORDS
Bifurcated tube, Gas explosion, Gas-coal dust coupling explosion, Shock wave overpressure, Mutation coefficient
PAPER SUBMITTED: 2020-07-29
PAPER REVISED: 2020-10-14
PAPER ACCEPTED: 2020-10-22
PUBLISHED ONLINE: 2020-12-05
DOI REFERENCE: https://doi.org/10.2298/TSCI200729337J
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 5, PAGES [3595 - 3605]
REFERENCES
  1. Cao, W. G., et al ., Experimental study on the combustion sensitivity parameters and pre combusted changes in functional groups of lignite coal dust. Powder Technol, 283 (2015), Oct., pp. 512 518
  2. Kurlenya, M. V., Skritsky, V. A., Metha ne explosions and causes of their origin in highly productive sections of coal mines. Journal of Mining Science, 53 (2017), 5, pp. 861 867
  3. Kundu, S. K., et al ., A review on understanding explosions from methane air mixture. Journal of Loss Prevention in th e Process Industries, 40 (2016), pp. 507 523
  4. Zhou, X. Q., et al ., Basic characteristics of coal mine gas explosion, China Coal, 28 (2002), 9, pp. 8 11
  5. Nagy, J., et al ., Explosion development in a spherical vessel, Minerva, 6 (1968), 3, pp. 388 397
  6. Cai, Z. Q., et al ., Experimental study on propagation characteristics of gas/coal dust explosion, Journal of China Coal Society, 34 (2009), 7, pp. 938 941
  7. Si, R. J., Wang, C. Q., Experimental research on the influence of gas on the character of coal dust explosion, China Safety Science Journal, 16 (2006), 12, pp. 86 91
  8. Si, R. J., Experiment study on the propagation laws of gas and coal dust explosion in coal mine, China Mining Magazine, 17 (2008), 12, pp. 81 84
  9. Wang, H. Y., Research on methane coal dust compound explosion intensity in enclosed vessels, Master thesis, Dalian University of Technology, Dalian, China, 2007
  10. Zhu, Q., Bai, C. H., Numerical simulatio n of gas coal dust air mixture explosion, China Safety Science Journal, 21 (2011), 5, pp. 83 89
  11. Bi, M. S., Li, J. B., Experimental study of methane coal dust compound explosion in a closed tube, Mining Safety & Environmental Protection, 37 (2010), 6, pp. 1 4
  12. Li, R. Z., Numerical simulation of coal dust explosion induced by gas explosion, Explosion and Shock Waves, 30 (2010), 5, pp. 529 534
  13. Li, R. Z. Simulation Study on propagation law of different amount deposited coal dust explosion induced by gas explosi on, Mining Safety & Environmental Protection, 40 (2013), 1, pp.17 20
  14. Wang, L., Li, R. Z., Experimental study on the explosion limits change laws under gas and coal dust coexisting conditions, China Mining Magazine 25 (2016), 4, pp. 87 90
  15. Dong, C. J., et a l., Effects of obstacles and deposited coal dust on characteristics of premixed methane air explosions in a long closed pipe, Safety Science, 50 (2012), 9, pp. 1786 1791
  16. Zhou, Y. H., et al., Experimental research into effects of obstacle on methane coal du st hybrid explosion, Journal of Loss Prevention in the Process Industries, 25 (2012), 1, pp. 127 130
  17. Jing, G. X., et al., Influence of obstacle on flame propagation laws of gas and coal dust explosion, Journal of Safety Science and Technology, 15 (2019), 9, pp. 99 104
  18. Rockwell, S. R., Rangwala, A. S., Influence of coal dust on premixed turbulent methane air flames, Combustion and Flame, 160 (2013), pp. 635 640
  19. Ajrash, M. J .., et al ., Methane coal dust hybrid fuel explosion properties in a large scale cylindrical explosion chamber, Journal of Loss Prevention in the Process Industries 40 (2016), pp. 317 328
  20. Addai, E. K., et al ., Minimum ignition energy of hybrid mixtures of combustible dusts and gases, Process Safety and Environmental Protection, 102 (2016), pp. 503 512
  21. Song, Y. F., et al ., Interaction between gas explosion flame and deposited dust, Process Safety and Environmental Protection, 111 (2017), pp. 775 784
  22. Cuervo, N., et al ., D etermination of the burning velocity of gas/dust hybrid mixtures, Process Safety and Environmental Protection, 109 (2017), pp. 704 715
  23. Song, S. X., et al ., Hybrid CH4/coal dust explosions in a 20 L spherical vessel, Process Safety and Environmental Protecti on, 122 (2019), pp. 281 287
  24. Ban, T., et al., Effect of ignition energy on coal dust explosion, Thermal Science, 24 (2020), 4, pp. 2621 2628
  25. Mittal, M., Explosion pressure measurement of methane air mixtures in different sizes of confinement, Journal of Loss Prevention in the Process Industries, 46 (2017), pp.200 208
  26. Mitu, M., et al ., Propagation indices of methane air explosions in closed vessels, Journal of Loss Prevention in the Process Industries, 47 (2017), pp.110 119
  27. Kundu, S. K., et al ., Confined explosi on of methane air mixtures under turbulence, Fuel, 220 (2018), pp. 471 480
PDF VERSION [DOWNLOAD]
Investigation on the characteristics of single-phase gas explosion and gas-coal dust coupling explosion in bifurcated tubes

© 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