THERMAL SCIENCE

International Scientific Journal

Zeenathul Farida Abdul Gani

,

Muthu Saravanan N

COMPUTATIONAL ANALYSIS ON THE STABILITY AND CHARACTERISTICS OF PARTIALLY PREMIXED BUTANE-AIR OPEN FLAMES IN TUBULAR BURNER

ABSTRACT
Partially premixed combustion is one of the developing areas of combustion research that has the advantages of both premixed and diffusion mode of combustion. The present work involves a computational study on the stability and characteristics of partially premixed butane-air flames. The effect of operating parameters like fuel-air ratio, primary aeration, and the presence of co-flow and co-swirl on the stability and flame characteristics has been studied. The simulation results show that the height of the flame decreases with an increase in primary aeration and also in the presence of a co-swirl stream. It has also been found that the stability of flames increases with co-swirl air but deteriorates with the presence of the co-flow air. The flame temperature increases with primary aeration and it has been observed that the peak flame temperature shifts away from the burner mouth for lower primary aeration. It has been observed that the flame stability improves with co-swirl air which is attributed to the re-circulation zone created due to the swirl motion which acts as a heat source. The poor stability in the presence of co-flow air is attributed to flame stretching and aerodynamic quenching of the stretched flamelets. The lift-off velocity and the stable operating range increases with equivalence ratio and also with co-swirl air.
KEYWORDS
flames, Lift-off, blow-out, equivalence ratio, primary aeration, recirculation zone
PAPER SUBMITTED: 2021-07-12
PAPER REVISED: 2021-09-11
PAPER ACCEPTED: 2021-09-12
PUBLISHED ONLINE: 2021-11-06
DOI REFERENCE: https://doi.org/10.2298/TSCI210712320A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 5, PAGES [3763 - 3772]
REFERENCES
  1. Zeenathul Farida Gani, Behdad Moghtaderi, Terry F. Wall "Ignition Characteristics of Single Coal Particles in Air (O2/N2) and Oxy-Fuel (O2/CO2) Environments" 1st Oxyfuel Combustion Conference, Cottbus, Germany, 2009, Vol1
  2. Zeenathul Farida Abdul Gani, Arun Pandian P., Modelling of coal combustion in a Drop Tube Furnace in Air and Oxy fuel Environment, Materials Today Proceedings, (article in press) 2021, Article in press, doi.org/10.1016/j.matpr.2021.05.269
  3. Kalghatgi GT. Blow-out stability of gaseous jet diffusion flames Part II: effect of cross wind. Combustion Science and Technology 26 (1981); , pp.241-244. doi.org/10.1080/00102208108946965
  4. Pitts WM. Assessment of theories for the behavior and blowout of lifted turbulent jet diffusion flames. Proceedings of twenty second International Symposium on Combustion (1988) Vol 22, pp. 803-16. doi.org/10.1016/S0082-0784(89)80090-6
  5. Lewis, B. and von Elbe, G., Combustion, Flames and Explosions of Gases, 2nd Edition, Academic, New York, 1961. eBook ISBN: 9780323138024
  6. Vanquickenborne L, van Tiggelen A. The stabilization mechanism of lifted diffusion flames. Combustion and Flame 10, (1966), pp.59-69. doi.org/10.1016/0010-2180(66)90028-9
  7. Miake-Lye RC, Hammer JA. Lifted turbulent jet flames: a stability criterion based on the jet large-scale structure. Proceedings of twenty second Internatoinal Symposium on Combustion 1988, Vol 22, pp. 817-24. doi.org/10.1016/S0082-0784(89)80091-8
  8. Rokke NA, Hustad JE, Sonju OK. A study of partially premixed unconfined propane flames. Combustion and Flame 97, (1994), pp. 88-106. doi.org/10.1016/0010-2180(94)90118-X
  9. Karlovitz, B, Dennistor, D. W, Jr., Knapschaefer, D. H.and Wells, F. E., Studies on turbulent flames, Fourth Symposium (International) on Combustion, Williams and Wilkins, Baltimore, 1953, vol 4, pp. 613.
  10. Kalyan Raja, R. and Shet, U. S. P., Stability of partially premixed laminar flames in cross-flow, Eighteenth National Conference on IC Engines and Combustion, College of Engineering, Thiruvananthapuram, India, December 17-19, 2003, pp.413-419
  11. Wang, Q., Hu, L., Yoon, S. H., Lu, S., Delichatsios, M., & Chung, S. H., Blow-out limits of nonpremixed turbulent jet flames in a cross flow at atmospheric and sub-atmospheric pressures. Combustion and Flame, 162, (2015),10, pp.3562-3568. doi:10.1016/j.combustflame.2015.06.012
  12. Moore, N. J., Kribs, J., & Lyons, K. M. Investigation of Jet-Flame Blowout with Lean-Limit onsiderations. Flow, Turbulence and Combustion, 87, (2011), 4, pp. 525-536. doi:10.1007/s10494-011-9334-3
  13. Chen, Z., Ruan, S., & Swaminathan, N., Simulation of turbulent lifted methane jet flames: Effects of air-dilution and transient flame propagation. Combustion and Flame, 162(2015), 3, pp. 703-716. doi:10.1016/j.combustflame.2014.09.010
  14. Quattrocchi, S., Aggarwal, S. K., & Katta, V. R., Liftoff and blowout characteristics of laminar syngas nonpremixed flames. International Journal of Hydrogen Energy, 43, (2018), 12, pp. 6421-6433. doi:10.1016/j.ijhydene.2018.01.194
  15. Palacios, A., Rengel, B., Wang, Q., & Hu, L., Analysis of experimental flame shapes and blowout velocities of partially-premixed methane-air jet flames. Fuel, 269,(2020), pp. 117430-117435. doi:10.1016/j.fuel.2020.117430
  16. C.-Y. Wu, Y.-C. Chao, T.-S. Cheng, Y.-H. Li, K.-Y. Lee, and T. Yuan, "The blowout mechanism of turbulent jet diffusion flames," Combustion and Flame, 145(2006), 3, pp. 481-494 doi.org/10.1016/j.combustflame.2006.01.004
  17. W. J. A. Dahm and R.W. Dibble, "Co-flowing turbulent jet diffusion flame blowout," in Proceedings of the 22nd International Symposium on Combustion, pp. 801-808, The Combustion Institute, Seattle,Wash, USA, August 1988. doi.org/10.1016/S0082-0784(89)80089-X
  18. D. Han and M. G. Mungal, "Observations on the transition from flame liftoff to flame blowout," in Proceedings of the 28th International Symposium on Combustion, pp. 537-543, The Combustion Institute, Edinburgh, UK, July-August 2000. doi.org/10.1016/S0082-0784(00)80253-2
  19. Zeenathul Farida, Kumaran, U.S.P. Shet, T. Sundararajan, "Stability of Partially Premixed Tubular Burner Flames with Co-Flow and External Swirl Air", 5th Asia-Pacific Conference on Combustion, Adelaide, Australia, July 2005
  20. Tarek Echekki, Epaminondas Mastorakos, "Turbulent Combustion: Concepts, Governing Equations and Modeling Strategies", Turbulent Combustion Modelling, 2011, ISSN 0926-5112 doi: 10.1007/978-94-007-0412-1_2
  21. ANSYS Inc. 14.0 Help // User's Guide :: 2 // Using This Manual // 1. The Contents of This Manual
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Computational analysis on the stability and characteristics of partially premixed butane-air open flames in tubular burner

© 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