Stabilization of Lean Premixed Flames Anchored to Hollow Cylinders with Modified Top-Surface Geometries

International Journal of Mechanical Engineering

© 2021 by SSRG - IJME Journal

Volume 8 Issue 7

Year of Publication : 2021

Authors : M. M. Abd Elhameed, A. M. Hamed, A.E. Hussin, W. Aboelsoud, M. M. Kamal

10.14445/23488360/IJME-V8I7P104

How to Cite?

M. M. Abd Elhameed, A. M. Hamed, A.E. Hussin, W. Aboelsoud, M. M. Kamal, "Stabilization of Lean Premixed Flames Anchored to Hollow Cylinders with Modified Top-Surface Geometries," SSRG International Journal of Mechanical Engineering, vol. 8,  no. 7, pp. 24-29, 2021. Crossref, https://doi.org/10.14445/23488360/IJME-V8I7P104

Abstract:

Stable combustion of lean premixed flames with high velocity approaching reactants has been investigated by researchers over decades. There are several techniques for stabilizing a flame during combustion, and this research work focuses on flames anchored to bluff bodies. A novel design of a combustion chamber with co-benefits of preheating the approaching fuel-air mixture as well as trapping the recirculation zone within a modulating-height gap was investigated. Three bluff bodies with different blockage ratios and modified top surfaces were experimentally tested, and flammability limits of an LPG/air gaseous mixture were obtained. Operating conditions associated with bluff bodies were found to range from the lowest equivalence ratio of 0.44 at a blowoff velocity of 124 m/s to 0.53 at 145 m/s blowoff velocity. A maximum operating temperature of 1965 K was achieved during stoichiometric operation.

Keywords:

Bluff bodies, flame anchoring, lean premixed flames, preheating, flammability limits, hollow cylinders, trapped vortex cavity.

References:

[1] Lieuwen, T. C., Unsteady combustor physics. Cambridge University Press.,(2012).
[2] Shanbhogue, S. J., Husain, S., & Lieuwen, T., Lean blowoff of bluff body stabilized flames: Scaling and dynamics. Progress in Energy and Combustion Science, 35(1) (2009) 98-120.
[3] Geikie, M. K., Carr, Z. R., Ahmed, K. A., & Forliti, D. J., On the flame-generated vorticity dynamics of bluff-body-stabilized premixed flames. Flow, Turbulence and Combustion, 99(2) (2017) 487-509.
[4] Miguel-Brebion, M., Mejia, D., Xavier, P., Duchaine, F., Bédat, B., Selle, L., & Poinsot, T., Joint experimental and numerical study of the influence of flame holder temperature on the stabilization of a laminar methane flame on a cylinder. Combustion and Flame, 172 (2016) 153-161.
[5] Chowdhury, B. R., & Cetegen, B. M., Effects of fuel properties and free-stream turbulence on characteristics of bluff-body stabilized flames. Combustion and Flame, 194 (2018) 206-222.
[6] Zukoski, E. E., & Marble, F. E., Experiments concerning the mechanism of flame blowoff from bluff bodies., (1983).
[7] Foster, J. R., Effects of combustion chamber blockage on bluff body flame stabilization (Doctoral dissertation, California Institute of Technology)., (1956).
[8] Vance, F. H., Shoshin, Y., van Oijen, J. A., & de Goey, L. P. H..
Effect of Lewis number on premixed laminar lean-limit flames stabilized on a bluff body. Proceedings of the Combustion Institute, 37(2) (2019) 1663-1672.
[9] Michaels, D., & Ghoniem, A. F., Impact of the bluff-body material on the flame leading edge structure and flame–flow interaction of premixed CH4/air flames. Combustion and Flame, 172 (2016) 62-78.
[10] Kim, W., Im, S. K., Do, H., & Mungal, M. G., Flame liftoff height dependence on geometrically modified bluff bodies in a vitiated flow. Experiments in Fluids, 49(1) (2010) 27-41.
[11] Lin, C. X., & Holder, R. J., Reacting turbulent flow and thermal field in a channel with inclined bluff body flame holders. Journal of heat transfer, 132(9) (2010).
[12] Kang, S. H., Lee, Y. J., Yang, S. S., & Choi, B., Effects of flame holder configurations on combustion in scramjet engines. Journal of Propulsion and Power, 28(4) (2012) 739-746.
[13] Kim, W., Do, H., & Mungal, M. G., The improvement of blowout limit is partially/fully premixed flames with geometrically modified bluff-body bases. Experiments in Fluids, 51(5) (2011) 1315-1328.
[14] Kiel, B., Garwick, K., Gord, J., Miller, J., Lynch, A., Hill, R., & Phillips, S., A detailed investigation of bluff body stabilized flames in 45th AIAA Aerospace Sciences Meeting and Exhibit (168) (2007).
[15] Hsu, K. Y., Goss, L. P., & Roquemore, W. M., Characteristics of a trapped-vortex combustor. Journal of Propulsion and Power, 14(1) (1998) 57-65.
[16] Xavier, P., Investigation of flame stabilization mechanisms in a premixed combustor using a hot gas cavity-based flame holder (Doctoral dissertation, INSA de Rouen).(2014).
[17] Wan, J., Fan, A., & Yao, H, . Effect of the length of a plate flame holder on flame blowout limit in a micro-combustor with preheating channels. Combustion and Flame, 170 (2016) 53-62.
[18] Ma, L., Xu, H., Wang, X., Fang, Q., Zhang, C., & Chen, G., A novel flame-anchorage micro-combustor: Effects of flame holder shape and height on premixed CH4/air flame blow-off limit. Applied Thermal Engineering, 158 (2019) 113836.
[19] Wan, J., & Fan, A., Effect of solid material on the blow-off limit of CH4/air flames in a micro combustor with a plate flame holder and preheating channels. Energy Conversion and Management, 101 (2015) 552-560.
[20] Hong, S., Shanbhogue, S. J., Kedia, K. S., & Ghoniem, A. F., Impact of the flame-holder heat-transfer characteristics on the onset of combustion instability. Combustion science and technology, 185(10) (2013) 1541-1567.
[21] Wan, J., Fan, A., Yao, H., & Liu, W., Experimental investigation and numerical analysis on the blow-off limits of premixed CH4/air flames in a mesoscale bluff-body combustor. Energy, 113(2016) 193-203.
[22] Xavier, P., Investigation of flame stabilization mechanisms in a premixed combustor using a hot gas cavity-based flame holder (Doctoral dissertation, INSA de Rouen).,(2014).
[23] Kedia, K. S., & Ghoniem, A. F., The anchoring mechanism of a bluff-body stabilized laminar premixed flame. Combustion and Flame, 161(9) (2014) 2327-2339.
[24] Wan, J., Shang, C., & Zhao, H., Anchoring mechanisms of methane/air premixed flame in a diverging mesoscale combustor with cylindrical flame holder. Fuel, 232 (2018) 591-599.
[25] Wan, J., & Zhao, H., Experimental study on blow-off limit of a preheated and flame holder-stabilized laminar premixed flame. Chemical Engineering Science, 223 (2020) 115754.
[26] Wan, J., & Zhao, H., Effect of the thermal condition of a solid wall on the stabilization of a preheated and holder-stabilized laminar premixed flame. Energy., 200 (2020) 117548.
[27] Radhakrishnan, K., Heywood, J. B., & Tabaczynski, R. J., Premixed turbulent flame blowoff velocity correlation based on coherent structures in turbulent flows. Combustion and Flame, 42 (1981) 19-33.
[28] Wan, J., & Zhao, H., Dynamics of premixed CH4/air flames in a micro combustor with a plate flame holder and preheating channels. Energy, 139 (2017) 366-379.
[29] Williams, G. C., Hottel, H. C., & Scurlock, A. C., Flame stabilization and propagation in high-velocity gas streams. In Symposium on Combustion and Flame, and Explosion Phenomena 3(1) (1948) (21-40). Elsevier.
[30] Wright, F. H. (1959). Bluff-body flame stabilization: blockage effects. Combustion and Flame, 3 (1959) 319-337.
[31] Bagheri, G., Hosseini, S. E., & Wahid, M. A. (2014). Effects of bluff body shape on the flame stability in premixed micro-combustion of the hydrogen-air mixture. Applied Thermal Engineering, 67 (2014) (1-2) 266-272.