THERMAL SCIENCE

International Scientific Journal

Ning Zhou

,

Xi Chen

,

Xue Li

,

Bing Chen

,

Ying Zhang

,

Weibo Huang

,

Xuanya Liu

,

Jiawei Tian

,

Yongbin Yu

,

Tianxiang Sun

,

Weiqiu Huang

,

Chunhai Yang

,

Huijun Zhao

THE EFFECT OF PIPE-LINE STRUCTURE ON THE FLAMMABILITY CHARACTERISTICS OF HYDROGEN-AIR PREMIXED GAS UNDER END-OPENING CONDITIONS

ABSTRACT
The pipe structures and opening conditions have an important influence on gas explosion, but little research has been done on the coupling analysis of the two. In order to reveal the effect of pipe structure on the flammability characteristics of hydrogen-air premixed gas under end-opening conditions, the flame structure, flame propagation velocity, explosion pressure and flow field distribution in the explosion process of hydrogen-air premixed gas in different pipe structures were analyzed by numerical simulation. The results show that the flame propagation velocity and pressure are less influenced by the end-opening structure in the initial ignition stage, however, when the flame propagates to the pipe end, the flame propagation velocity in each pipe structure is significantly enhanced. The 90° elbow has a certain inhibitory effect on the flame development, while the T-shaped bifurcation structure can effectively increase the degree of gas detonation. In pipe with large aspect ratio, due to the wall effect, the effect of acoustic oscillation disturbance on the flame front and the air-flow release effect of the end-opening, there are two peaks and two troughs in the pressure rise rate curve of each pipe-line structure.
KEYWORDS
Pipeline structure, Hydrogen-air premixed gas, flame propagation, Explosion overpressures, flow field
PAPER SUBMITTED: 2022-09-10
PAPER REVISED: 2022-10-15
PAPER ACCEPTED: 2022-10-18
PUBLISHED ONLINE: 2022-12-17
DOI REFERENCE: https://doi.org/10.2298/TSCI220910191Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 4, PAGES [2677 - 2689]
REFERENCES
  1. Boukhelef, M., et al., Numerical study of the injection conditions effect on the behavior of hydrogen-air diffusion flame, Thermal Science, 26. (2022), 5 Part A, pp. 3741-3750
  2. Mintz, M., et al., Hydrogen: On the Horizon or Just a Mirage?, SAE Transactions, 111. (2002), pp. 911-921
  3. Chen, C. K., et al., Comparative numerical simulation analysis on explosion of hydrogen and propane in highway tunnel, Journal of Safety Science and Technology, 13. (2017), pp. 151-155
  4. Liu, Z. L., et al., Simulation analysis on leakage and explosion accident consequence of buried hydrogen pipeline, Journal of Safety Science and Technology, 15. (2019), pp. 94-100
  5. Yu, L. X., et al., Flame propagation of H2-air in a semi-open obstructed tube, Journal of Combustion Science and Technology, 8. (2002), 1, pp. 27-30
  6. Wen, X. J., et al., Numerical study on hydrogen combustion in a semiconfined pipe with obstacles, Fire Safety Science, 26. (2017), 2, pp. 61-67
  7. Uchida, M., et al., Pressure loading of detonation waves through 90-degree bend in high pressure H2-O2-N2 mixtures, Proceedings of the Combustion Institute, 33. (2011), 2, pp. 2327-23332
  8. Li, M., et al., Experimental and large eddy simulation study on gasoline-air mixture explosions in semi-confined pipe with 90° right-angle bend, CIESC Journal, 69. (2018), 12, pp. 5370-5378
  9. Frolov, S.M., et al., Shock wave and detonation propagation through U-bend tubes, Proceedings of the Combustion Institute, 31. (2007), 2, pp. 2421-2428
  10. Zhou, N., et al., Effects of ignition position on explosion of premixed propane-air in a T-type pipe, Process Safety Progress, 40. (2020), 1, DOI No. 10.1002/prs.12184
  11. Zhou, N., et al., Effect of hydrogen addition on the explosion characteristics of methanehydrogen-air mixture in T-shaped bifurcation pipe, Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 44. (2022), 2, pp. 3808-3822
  12. Zhou, N., et al., Experimental study on hydrogen-air premixed gas explosion in confined space, Energy Sources, Part A: Recovery, Utilization, and Environmental Effects. (2020), pp. 1-12
  13. Xiao, H. H., et al., An experimental study of premixed hydrogen/air flame propagation in a partially open duct, International Journal of Hydrogen Energy, 39. (2014), 11, pp. 6233-6241
  14. Ponizy, B., et al., Tulip flame - the mechanism of flame front inversion, Combustion and Flame, 161. (2014), 12, pp. 3051-3062
  15. Dostiyarov, A., et al., A novel vortex combustion device: Experiments and numerical simulations with emphasis on the combustion process and NOx emissions, Thermal Science, 26. (2022), 2 Part C, pp. 1971-1983
  16. Ciccarelli, G., Dorofeev, S., Flame acceleration and transition to detonation in ducts, Progress in Energy and Combustion Science, 34. (2008), 4, pp. 499-550
  17. Xiao, H. H., et al., An experimental study of distorted tulip flame formation in a closed duct, Combustion and Flame, 160. (2013), 9, pp. 1725-1728
  18. Zhou, L. X., Basic research and numerical simulation of turbulent two-phase combustion, Combustion Science and Technology, 19. (2013), 6, pp. 479-487
  19. Zhou, L. X., et al., Recent research progress of large eddy simulation of turbulent combustion, Journal of Engineering Thermophysics, 27. (2006), 2, pp. 331-334
  20. Liu, Y., et al., Large eddy simulation and its application in turbulent combustion, Advances in Mechanics, 31. (2001), 2, pp. 215-226
  21. Lamoureux, N., et al., Laminar flame velocity determination for H2-air-He-CO2 mixtures using the spherical bomb method, Experimental Thermal and Fluid Science, 27. (2003), 4, pp. 385-393
  22. Liu, X. S., et al., Combined effects of obstacle position and equivalence ratio on overpressure of premixed hydrogen-air explosion, International Journal of Hydrogen Energy, 41. (2016), 39, pp. 17740-17749
  23. Chen, Y. Y., et al., The misfire degree and its effects on combustion and pollutant formation of subsequent cycles: A study on a high speed gasoline engine, Thermal Science, 26. (2022), 2 Part C, pp. 1649-1663
  24. Christophe, C., Geoffrey, S., On the "tulip flame" phenomenon, Combustion and Flame, 105. (1996), 1, pp. 225-238
  25. Matalon, M., Flame dynamics, Proceedings of the Combustion Institute, 32. (2009), 1, pp. 57-82
  26. Bychkov, V.V., Liberman, M.A., Dynamics and stability of premixed flames, Physics Reports, 325. (2000), 4, pp. 116-237
  27. Mei, Y., et al., Flame propagation of premixed hydrogen-air explosions in bend pipes, Journal of Loss Prevention in the Process Industries, 77. (2022), DOI NO. 10.1016/j.jlp.2022.104790
  28. Zhu, Y. J., et al., A numerical study on shock induced distortion, mixing and combustion of flame, Explosion and Shock Waves, 33. (2013), 4, pp. 430-437
  29. Zhou, N., et al., Numerical simulation of the influence of vent conditions on H2/air explosion characteristics, Chemical Industry and Engineering Progress, 40. (2021), 4, pp. 3656-3663
  30. Zhou, N., et al., Numerical simulation study on the combustion rule of bending structure in pipes, Combustion Science and Technology, 190. (2018), 9, pp. 1500-1514
  31. Sun, H., et al., Numerical Simulation of the Influence of Vent on Hydrogen Flame Propagation in Pipeline, Industrial Safety and Environmental Protection, 47. (2021), 12, pp. 7-11
  32. Blanchard, R., et al., Explosions in closed pipes containing baffles and 90 degree bends, Journal of Loss Prevention in the Process Industries, 23. (2010), 2, pp. 253-259
  33. Ugarte, O.J., et al., Critical role of blockage ratio for flame acceleration in channels with tightly spaced obstacles, Physics of Fluids, 28. (2016), 9, DOI NO. 10.1063/1.4961648
  34. Gonzalez, M., Acoustic instability of a premixed flame propagating in a tube, Combustion and Flame, 107. (1996), 3, pp. 245-259
  35. Xiao, H. H., et al., A study on the dynamic behavior of premixed propane-air flames propagating in a curved combustion chamber, Fuel, 228. (2018), pp. 342-348
  36. Wang, C. J., et al., Gaseous detonation propagation in a bifurcated tube, Journal of Fluid Mechanics, 599. (2008), pp. 81-110
PDF VERSION [DOWNLOAD]
The effect of pipe-line structure on the flammability characteristics of hydrogen-air premixed gas under end-opening conditions

© 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