International Scientific Journal

Thermal Science - Online First

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Effect of mixture velocity for given equivalence ratio on flame development in Swiss roll combustor

Small-scale power generation using heat energy from hydrocarbon (HC) fuels is a proven technology. In this study, we analyzed 2D flame development in meso-scale Swiss roll combustor (SW). A mixture of 60% butane and 40 % propane was used (0.25-0.55 l/min). During all the analyses, equivalence ratio (1.1) was kept constant by adjusting air quantity against fuel quantity. The effect of increase in the mixture velocity on the development of flame shapes/patterns was monitored. We found different patterns of flame, e.g., Planar, Concave, conical, with the increase in mixture velocity. Increase in combustion chamber temperature was also noted. No Flashback was observed and blowout was observed with very high mixture velocity. Combustion chamber temperatures were found to be increasing with the increase in mixture velocity at the same equivalence ratio. Elongation of the flame was observed because of the increased flow velocity. Heat recirculation to the reactants enhances flame characteristics.
PAPER REVISED: 2019-05-07
PAPER ACCEPTED: 2019-05-12
  1. Fernandez - Pello, A. C., Proc. Combustion. Institute, 2002, Vol. 29, pp. 883 - 899.
  2. Ju, Y. and Maruta, K., Micro scale combustion, Technology development and fundamental research, Progress in energy and combustion science, (2011), pp. 1 - 47.
  3. Kim N. I., et al., Flame stabilization and emission of small Swiss roll combustor as heaters, Combustion and Flame, 141 (2005), pp. 229-240.
  4. Ahn, J., et al., Gas-phase and Catalytic combustion in heat-recirculating burners,.Proceedings of The Combustion Institute, 30 (2005), pp.2463 - 2472
  5. Wang, Y., et al., Instabilibilty of Flame in Micro-Combustor Under Different External Thermal Environment, Experimental Thermal and Fluid Science, 35(2011), pp. 1451-1457.
  6. Lloyd, S. A. and Weinberg, F. J., A Burner for Mixtures of Very Low Heat Content, Nature, 251(1974), pp. 47-49.
  7. Lloyd, S. A. and Weinberg, F. J., Limit to Energy Release and Utilization from Chemical Fuels, Nature,252 (1975), pp.367- 370.
  8. Bei-Jing, Z. and Jian-Hua,W., Experimental study on premixed CH4/air mixture combustion in micro Swiss roll combustor, Combustion and Flame, 157 (2010). 2222-2229.
  9. Sitzki, L., et al., Combustion in micro scale heat recirculating burners,The Third Asia Pacific Conference on Combustion, Seoul, Korea, 2001.
  10. Lee, M. J., et al., Scale and materials effects on flame characteristics in small heat recirculation combustors of counter-current channel type, Applied Thermal Engineering, 30 (2010), pp.222-2235.
  11. Takase, K., et al., Extinction characteristics of CH4/O2/Xe radiative counter flow planner premixed flames and their transition to ball- like flames, Combustion and flame, 160 (2013),pp. 1235 - 1241.
  12. Fujiwara, K. and Nakamura, Y., Experimental study on the stability mechanism via miniaturization of jet diffusion flames (micro flame) by utilizing preheated air system, Combustion and flame, 160 (2013), pp. 1373 - 1380.
  13. Fan, A., et al., Experimental investigation on flame pattern formations of DME-air mixtures in a radial micro channels, Combustion and Flame, 157 (2010), pp.1637-1642.
  14. Kumar, S., et al., Experimental investigations on the combustion behavior of methane-air mixtures in a micro scale radial combustion configuration, J. Micromech. Microeng., 17 (2007), pp.900-908.
  15. Fan, A., et al.,Experimental investigations of flame pattern transitions in a heated radial micro channels, Applied Thermal Engineering ,47 (2012), pp. 111 - 118.
  16. Fan, A., et al.,Experimental and numerical investigations of the flame pattern formations in the radial micro channels, Proceedings of the Combustion Inst., 2009.