International Scientific Journal

Thermal Science - Online First

online first only

The joint influence of the hydrogen additions and the opening ratios on the propagation dynamics of premixed syngas/air flame

To further understand the combustion characteristics of syngas/air, the behaviors of premixed flame at various hydrogen additions and opening ratios were investigated. The combustion vessel is a half-open rectangular duct 50mm square by 900mm long. The shape of the flame is photographed by a high-speed camera and the pressure is measured by a pressure sensor at the closed end of the duct. The effect of the two variables on the flame dynamics are considered through the analysis of the flame shape evolution and the overpressure oscillation. The results show that the tulip flame appeared earlier and the overpressure peak reach the maximum under the condition of 30% hydrogen fraction; with increasing of the opening ratio, the tulip flame appeared later and the overpressure peak gradually decreased. Under the experimental conditions of the opening with the increase of the volumes of hydrogen blend ratio, the overpressure peak increased systematically, but the occurrence time fluctuated. The results show that the influence of the opening ratio and the hydrogen blend ratio pressures is mainly impacted when the hydrogen blend ratio is at least 30%,with a 0.25 opening ratio. At these critical parameters, the overpressure peak reaches a maximum of 0.9bar;when the opening ratio is 0.5, the overpressure peak suddenly dropped to 0.39bar.
PAPER REVISED: 2021-06-14
PAPER ACCEPTED: 2021-06-26
  1. Kumar, G., et al., Recent developments on alternative fuels, energy and environment for sustainability. Bioresource Technology, 317 (2020), 4, 124010.
  2. Momirlan, M. Veziroglu, T. N., Current status of hydrogen energy. Renewable & Sustainable Energy Reviews, 6, (2002), 1-2, 141-179.
  3. Furukawa, H., Yaghi, O. M., Storage of hydrogen, methane, and carbon dioxide in highly porous covalent organic frameworks for clean energy applications. Journal of the American Chemical Society, 131 (2009), 25, 8875-8883.
  4. Kothari, R., et al., Fermentative hydrogen production - an alternative clean energy source. Renewable & Sustainable Energy Reviews, 16 (2012), 4, 2337-2346.
  5. Saffers J B, Molkov V V., Towards hydrogen safety engineering for reacting and non-reacting hydrogen releases. Journal of Loss Prevention in the Process Industries, 26 (2013), 2, 344-350.
  6. Dincer I, Balta MT., Potential thermochemical and hybrid cycles for nuclear-based hydrogen production. International Journal of Energy Research, 35 (2011), 2, 123-137.
  7. Dillon, A. C., Heben, M. J., Hydrogen storage using carbon adsorbents: past, present and future. Applied Physics A, 72 (2001), 2, 133-142.
  8. Rostrup-Nielsen J R., New aspects of syngas production and use. Catalysis today, 63 (2000), 2-4, 159-164.
  9. Sifer, N., Gardner, K., An analysis of hydrogen production from ammonia hydride hydrogen generators for use in military fuel cell environments. Journal of Power Sources, 132 (2004), 1-2, 135-138.
  10. Rostrup-Nielsen J R., New aspects of syngas production and use. Catalysis today, 63 (2000), 2-4, 159-164.
  11. Kim J S, et al., A study on methane-air premixed flames interacting with syngas-air premixed flames. International journal of hydrogen energy, 35 (2010), 3, 1390-1400.
  12. Brambilla A, et al., Flame dynamics in lean premixed CO/H2/air combustion in a mesoscale channel. Combustion and flame, 161 (2014), 5, 1268-1281.
  13. ] Matalon M, Metzener P., The propagation of premixed flames in closed tubes. Journal of Fluid Mechanics, 336, (1997), 331-350.
  14. D Dunn-Rankin, et al., Numerical and experimental study of "tulip" flame formation in a closed vessel. Symposium on Combustion, 21 (1988), 1, 1291-1301.
  15. Philippe Metzener, Moshe Matalon., Premixed flames in closed cylindrical tubes,5, (2001) 3, 463-483.
  16. Yu, M. et al., Experimental study on explosion characteristics of syngas with different ignition positions and hydrogen fraction. International Journal of Hydrogen Energy, 44 (2019), 29, 15553-15564.
  17. Huahua, Xiao, et al., An experimental study of premixed hydrogen/air flame propagation in a partially open duct. International Journal of Hydrogen Energy, 39 (2014), 11, 6233-6241.
  18. Fairweather M, et al., Studies of premixed flame propagation in explosion tubes. Combustion and Flame, 116 (1999), 4, 504-518.
  19. Yao Z, et al., On explosion characteristics of premixed syngas/air mixtures with different hydrogen volume fractions and ignition positions. Fuel, (2020), 119619.
  20. Luo Z, et al., Explosion pressure and flame characteristics of CO/CH4/air mixtures at elevated initial temperatures. Fuel, 268 (2020), 117377.
  21. Clanet C, Searby G., On the "tulip flame" phenomenon. Combustion and flame, 105 (1996), 1-2, 225-238.
  22. Huahua Xiao, et al., Experimental study on the behaviors and shape changes of premixed hydrogen-air flames propagating in horizontal duct. International Journal of Hydrogen Energy, 36 (2011), 10.
  23. Dunn-Rankin D, Sawyer R F., Tulip flames: changes in shape of premixed flames propagating in closed tubes. Experiments in fluids, 24 (1998), 2, 130-140.
  24. Xiao H, et al., An experimental study of distorted tulip flame formation in a closed duct. Combustion and flame, 160 (2013), 9, 1725-1728.
  25. Bychkov, Vitaly, et al., "Flame Acceleration in the Early Stages of Burning in Tubes." Combustion and Flame, 150 (2007), 4, 263-276.
  26. Leyer J C, Manson N., Development of vibratory flame propagation in short closed tubes and vessels. Symposium (International) on Combustion. Elsevier, 13 (1971), 1, 551-558.
  27. Xiao H, et al., Experimental and numerical investigation of premixed flame propagation with distorted tulip shape in a closed duct. Combustion and Flame, 159 (2012), 4, 1523-1538.
  28. Zhang, B, et al., Experimental study of detonation limits in methane-oxygen mixtures: determining tube scale and initial pressure effects. Fuel, 259 (2020), 116220-.
  29. Ibrahim S S, Masri A R., The effects of obstructions on overpressure resulting from premixed flame deflagration. Journal of Loss Prevention in the Process Industries, 14 (2001), 3, 213-221