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http://dx.doi.org/10.6108/KSPE.2018.22.6.056

Non-Reacting Flow Structure of a Low Swirl Combustor with respect to Inlet Velocities  

Jeong, Hwanghui (School of Mechanical Engineering, Gwangju Institute of Science and Technology)
Lee, Bok Jik (School of Mechanical Engineering, Gwangju Institute of Science and Technology)
Lee, Keeman (School of Aerospace and Mechanical Engineering, Sunchon National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.22, no.6, 2018 , pp. 56-63 More about this Journal
Abstract
In low swirl combustors the flame is lifted above the nozzle to achieve balance between the flame speed and velocity field at the exit of the nozzle. Characterization of the flame liftoff height is important because it affects the stability of the combustor and degradation of the nozzle material. In experiments, a counter-intuitive trend of flame liftoff heights with respect to inlet velocities was observed. To elucidate the complicated flow field in a low swirl combustor having swirl vanes and a turbulence generator, a series of numerical simulations of non-reacting flows was conducted by varying the inlet velocity. The flow structures at the exit of the nozzle with respect to the inlet velocities are investigated to support the observation in the experiments.
Keywords
Low Swirl Combustion; Flame Liftoff Height; Inlet Velocity; Large Eddy Simulation;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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1 Plessing, T., Kortschik, C., Peters, N., Mansour, M.S. and Cheng, R.K., "Measurements of the Turbulent Burning Velocity and the Structure of Premixed Flames on a Low-Swirl Burner," Proceedings of the Combustion Institute, Vol. 28, No. 1, pp. 359-366, 2000.   DOI
2 Jeong, H. and Lee, K., "Effect of Swirl Angles and Combustion Characteristics of Low Swirl Model Combustor," Journal of the Korean Society of Propulsion Engineers, Vol. 20, No. 4, pp. 40-49, 2016.   DOI
3 Jeong, H., Han, M.S., Kang, K., Lee, Y. and Lee, K., "An Experimental Study on the Effect of a Turbulence Generating Plate in Low Swirl Combustor," Journal of Mechanical Science and Technology, Vol. 31, No. 12, pp. 6077-6084, 2017.   DOI
4 Jeong, H., Kang, K. and Lee, K., "A Study on the Combustion Characteristics with Hydrogen Contents of SNG Fuel in Low-Swirl Combustor," Transactions of the Korean Hydrogen and New Energy Society, Vol. 28, No. 2, pp. 181-189, 2017.   DOI
5 Jeong, H., Lee, B.J., Han, M.S. and Lee, K., "A Study on the Flame Liftoff Height in a Lean-Premixed Low Swirl Combustor," Journal of The Korean Society of Combustion, Vol. 23, No. 3, pp. 36-42, 2018.   DOI
6 Weller, H.G., Tabor. G., Jasak, H. and Fureby, C., "A tensorial approach to computational continuum mechanics using object-oriented techniques," Computers in Physics, Vol. 12, No. 6, pp. 620-631, 1998.   DOI
7 Yochizawa, A. and Horiuti, K., "A Statistically-Derived Subgrid-Scale Kinetic Energy Model for the Large-Eddy Simulation of Turbulent Flows," Journal of the Physical Society of Japan, Vol. 54, No. 8, pp. 2834-2839, 1985.   DOI
8 Sohankar, A., Davidson, L. and Norberg, C., "A Dynamic One-Equation Subgrid Model for Simulaion of Flow around a Square Cylinder," Engineering Turbulence Modelling and Experiments 4, pp. 227-236, 1999.
9 Jang, M. and Lee, K., "A Study of Combustion Instability Mode according to the Variation of Combustor Length in Dual Swirl Gas Turbine Model Combustor," Journal of The Korean Society of Combustion, Vol. 21, No. 2, pp. 29-37, 2016.   DOI
10 Park, T.J., Hwang, C.H. and Lee, K., "Development of Hydrogen/Dual Jet Combustor for a MGT(Part I: Experimental Study on Geometric Optimization)," Journal of the Korean Society of Propulsion Engineers, Vol. 17, No. 5, pp. 60-69, 2013.   DOI
11 Kim, T.H., Kim, S.D., Jin, Y.I. and Min, S.K., "Effects of Flare Angle in Counter-Roataing Swirler on Swirling Flow," Journal of The Korean Society of Combustion, Vol. 21, No. 1, pp. 31-37, 2016.   DOI
12 Kim, L., Hong, J.S., Jeong, W.C., Yoo, K.H., Kim, J.C. and Sung, H.G., "Turbulent Combustion characteristics of a Swirl Injector in a Gas Turbine Annular Combustor Using LES and Level-set Flamelet," Journal of the Korean Society of Propulsion Engineers, Vol. 18, No. 2, pp. 1-9, 2014.   DOI
13 Cheng, R.K., "Velocity and Scalar Characteristics of Premixed Turbulent Flames Stabilized by Weak Swirl," Combustion and Flame, Vol. 101, No. 1-2, pp. 1-14, 1995.   DOI
14 Cheng, R.K., Yegian, D.T., Miyasato, M.M., Samuelsen, G.S., Benson, C.E., Pellizzari, R. and Lofus, P., "Scaling and Development of Low-Swirl Burners Low Emission Furnaces and Boilers," Proceedings of the Combustion Institute, Vol. 28, No. 1, pp. 1305-1313, 2000.   DOI