Study on Flame Structure and Combustion Instability in a Swirl-Stabilized Combustor

Donghyun Hwang, Sujin Bak, Kyubok Ahn

doi:10.15231/jksc.2020.25.2.001

All Issue

2020 Vol.25, Issue 2 Next Page

Research Article

Study on Flame Structure and Combustion Instability in a Swirl-Stabilized Combustor 스월-안정화 연소기에서 화염구조와 연소불안정에 대한 연구

June 2020. pp. 1-10

PDF XML

Abstract

Flame structure and combustion instability characteristics in a swirl-stabilized combustor were investigated by changing fuel, inlet mean velocity, equivalence ratio, and swirler geometry. Two different premixed gases consisting of air and hydrocarbon fuels (C₂H₄, CH₄) were supplied to a combustion chamber through an inlet section and an axial swirler. Dynamic pressure transducer and ICCD camera with a bandpass filter were used to measure pressure fluctuations and flame structures, respectively. The experimental results showed that the pressure fluctuations significantly increased, accompanied by the flame structure transition under certain conditions. Hollow cone flames were mainly formed under stable combustion, but heat release was distributed near the central axis of the combustion chamber under the combustion instability.

Keywords

Combustion instability

Flame structure

Heat release pattern

Turbulent lean premixed flame

References

A.W. Lefebvre, Lean Premixed/Prevaporized Combustion, NASA CP-2016, 1977.

R.E. Foglesong, T.R. Frazier, L.M. Flamand, J.E. Peter, R.P. Lucht, Flame Structure and Emissions Characteristics of a Lean Premixed Gas Turbine Combustor, 35^th Joint Propulsion Conference and Exhibit, 1999, 1999-2399.

10.2514/6.1999-2399

S. Tachibana, L. Zimmer, Y. Kurosawa, K. Suzuki, Active Control of Combustion Oscillations in a Lean Premixed Combustor by Secondary Fuel Injection Coupling with Chemiluminescence Imaging Technique, Proc. Combust. Inst., 31 (2007) 3225-3233.

10.1016/j.proci.2006.08.037

Y. Huang, H.G. Sung, S.Y. Hsieh, V. Yang, Large- Eddy Simulation of Combustion Dynamics of Lean- Premixed Swirl-Stabilized Combustor, J. Propul. Power, 19 (2003) 782-794.

10.2514/2.6194

Y. Huang, V. Yang, Bifurcation of Flame Structure in a Lean-Premixed Swirl-Stabilized Combustor: Transition from Stable to Unstable Flame, Combust. Flame, 136 (2004) 383-389.

10.1016/j.combustflame.2003.10.006

J.W.S. Rayleigh, The Theory of Sound, Dover Books on Physics, 1945.

Y. Huang, V. Yang, Effect of Swirl on Combustion Dynamics in a Lean-Premixed Swirl-Stabilized Combustor, Proc. Combust. Inst., 30 (2005) 1775-1782.

10.1016/j.proci.2004.08.237

Z.A. LaBry, S.J. Shanbhogue, R.L. Speth, A.F. Ghoniem, Flow Structure in a Lean-Premixed Swirl- Stabilized Combustor with Microjet Air Injector, Proc. Combust. Inst., 33 (2011) 1575-1581.

10.1016/j.proci.2010.06.092

M.C. Janus, G.A. Richards, M.J. Yip, E.H. Robbey, Effects of Ambient Conditions and Fuel Composition on Combustion Stability, Techinical Report, DOE, 1997.

10.2172/468492PMC6573299

T. Lieuwen, V. McDonell, E. Petersen, D. Santavicca, Fuel Flexibility Influences on Premixed Combsutor Blowout, Flashback, Autoignition, and Stability, J. Eng. Gas Turb. Power, 130 (2008) 11506.

10.1115/1.2771243

D. Ferguson, D. Straub, G. Richards, E. Robey, Impact of Fuel Variability on Dynamics Instabilities in Gas Turbine Combustion, 5th US Combustion Meeting, March 25th-28th, 2007.

J. Lee, J. Park, D. Han, K.T. Kim, Swirl Flow Effects on Flame-Flame Interactions in a Model Lean- Premixed Gas Turbine Combustor, J. Korean Soc. Combust., 23 (2018) 21-27.

S. Taamallah, Z.A. LaBry, S.J. Shanbhogue, A.F. Ghoniem, Thermo-Acoustic Instabilities in Lean Premixed Swirl-Stabilized Combustion and Their Link to Acoustically Coupled and Decoupled Flame Macrostructure, Proc. Combust. Inst., 35 (2015) 3273-3282.

10.1016/j.proci.2014.07.002

D. Fritsche, M. Furi, K. Boulouchos, An Experimental Investigation of Thermoacoustic Instabilities in a Premixed Swirl-Stabilized Flame, Combust. Flame, 151 (2007) 29-36.

10.1016/j.combustflame.2007.05.012

M.K. Kim, J. Yoon, S. Park, M.C. Lee, Y. Yoon, Effects of Unstable Flame Structure and Recirculation Zones in a Swirl-Stabilized Dump Combustor, Appl. Therm. Eng., 58 (2013) 125-135.

10.1016/j.applthermaleng.2013.04.019

J. Runyon, R. Marsh, P. Bowen, D. Pugh, A. Giles, S. Morris, Lean Methane Flame Stability in a Premixed Generic Swirl Burner: Isothermal Flow and Atmospheric Combustion Characterization, Exp. Therm Fluid Sci., 92 (2018) 125-140.

10.1016/j.expthermflusci.2017.11.019

A. Borsuk, J. Williams, J. Meadows, A.K. Agrawal, Swirler Effects on Passive Control of Combustion Noise and Instability in a Swirl-Stabilized Combustor, J. Eng. Gas Turb. Power, 137 (2015) 041504.

10.1115/1.4028613

B. Khandelwal, D. Lili, Y. Sethi, Design and Study on Performance of Axial Swirler for Annular Combustor by Changing Different Design Parameters, J. Energy Inst., 87 (2014) 372-382.

10.1016/j.joei.2014.03.022

J. Göttgens, F. Mauss, N. Peters, Analytic Approximations of Burning Velocities and Flame Thickness of Lean Hydrogen, Methane, Ethylene, Ethane, Acetylene, and Propane Flames, Proc. Combust. Inst., 24 (1992) 129-135.

10.1016/S0082-0784(06)80020-2

D. Hwang, K. Ahn, Y. Yoon, Flame Length Scaling of C₂H₄-Air Premixed Flames Under Acoustic Forcing, JAFM, 11 (2018) 647-654.

10.29252/jafm.11.03.28308

Information

Publisher :The Korean Society Combustion
Publisher(Ko) :한국연소학회
Journal Title :Journal of The Korean Society Combustion
Journal Title(Ko) :한국연소학회지
Volume : 25
No :2
Pages :1-10
Received Date :2019. 10. 14
Revised Date :2019. 10. 31
Accepted Date : 2019. 11. 07
DOI :https://doi.org/10.15231/jksc.2020.25.2.001

Journal of The Korean Society Combustion ISSN:1226-0959(Print) 2466-2089(Online) 한국연소학회지

All Issue