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Combustion instability characteristics in a dump combustor using different hydrocarbon fuels

Published online by Cambridge University Press:  30 April 2019

D. Hwang ,
Y. Song  and
K. Ahn Open the ORCID record for K. Ahn [Opens in a new window]
D. Hwang
Affiliation:
School of Mechanical Engineering, Chungbuk National University, Cheongju, Korea
Y. Song
Affiliation:
School of Mechanical Engineering, Chungbuk National University, Cheongju, Korea
K. Ahn*
Affiliation:
School of Mechanical Engineering, Chungbuk National University, Cheongju, Korea
*
[email protected]
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Abstract

The combustion instability characteristics in a model dump combustor with an exhaust nozzle were experimentally investigated. The first objective was to understand the effects of operating conditions and geometric conditions on combustion instability. The second objective was to examine more generalised parameters that affect the onset of combustion instability. Three different premixed gases consisting of air and hydrocarbon fuels (C2H4, C2H6, C3H8) were burnt in the dump combustor at various inlet velocity, equivalence ratio and combustion chamber length. Dynamic pressure transducer and photomultiplier tube with a bandpass filter were used to measure pressure fluctuation and CH* chemiluminescence data. Peak frequencies and their maximum power spectral densities of pressure fluctuations at same equivalence ratios showed different trends for each fuel. However, the dynamic combustion characteristics of pressure fluctuations displayed consistent results under similar characteristics chemistry times regardless of the used hydrocarbon fuels. The results showed that characteristic chemistry time and characteristic convection time influenced combustion instabilities. It was found that the convective-acoustic combustion instability could be prevented by increasing the characteristic chemistry time and characteristic convection time.

Keywords

Combustion instabilityDump combustorCharacteristic chemistry timeCharacteristic convection timeDominant frequencyPower spectral density
Type
Research Article
Information
The Aeronautical Journal , Volume 123 , Issue 1263 , May 2019 , pp. 586 - 599
Copyright
© Royal Aeronautical Society 2019 

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References

REFERENCES

Lefebvre, A.W. Lean premixed/prevaporized combustion, NASA CP-2016, Jan. 1977.Google Scholar
Foglesong, R.E., Frazier, T.R., Flamand, L.M., Peter, J.E. and Lucht, R.P. Flame structure and emissions characteristics of a lean premixed gas turbine combustor, 35th Joint Propulsion Conference and Exhibit, AIAA 1999-2399, Los Angeles, CA, 1999.Google Scholar
Tachibana, S., Zimmer, L., Kurosawa, Y. and Suzuki, K. Active control of combustion oscillations in a lean premixed combustor by secondary fuel injection coupling with chemiluminescence imaging technique, Proc Combust Inst, 2007, 31, (2), pp 3225–3233.CrossRefGoogle Scholar
Poinsot, T.J., Trouve, A.C., Veynante, D.P., Candel, S.M. and Esposito, E.J. Vortex-driven acoustically coupled combustion instabilities, J Fluid Mech, 1987, 177, pp. 265–292.CrossRefGoogle Scholar
Schadow, K.C. and Gutmark, E. Combustion instability related to vortex shedding in dump combustors and their passive control, Prog Energy Combust Sci, 1992, 18, (2), pp. 117–132.CrossRefGoogle Scholar
Yu, K.H., Trouve, A. and Daily, J.W. Low-frequency pressure oscillations in a model ramjet combustor, J Fluid Mech, 1991, 232, pp. 47–72.CrossRefGoogle Scholar
Samaniego, J.M., Yip, B., Poinsot, T. and Candel, S. Low-frequency combustion instability mechanisms in a side-dump combustor, Combust Flame, 1993, 94, (4), pp. 363–380.CrossRefGoogle Scholar
Gutmark, E., Schadow, K.C., Sivasegaram, S. and Whitelaw, J.H. Interaction between fluid-dynamic and acoustic instabilities in combusting flows within ducts, Combust Sci Technol, 1991, 79, (1–3), pp. 161–166.CrossRefGoogle Scholar
Sterling, J.D. and Zukoski, E.E. Longitudinal mode combustion instabilities in a dump combustor, 25th AIAA Aerospace Sciences Meeting, AIAA 1987-0220, Reno, NV, 1987.Google Scholar
Yoon, J., Kim, M.K., Hwang, J., Lee, J. and Yoon, Y. Effect of fuel-air mixture velocity on combustion instability of a model gas turbine combustor, Appl Therm Eng, 2013, 54, (1), pp. 92–101.CrossRefGoogle Scholar
Kim, M.K., Yoon, J., Oh, J., Lee, J. and Yoon, Y. An experimental study of fuel-air mixing section on unstable combustion in a dump combustor, Appl Therm Eng, 2014, 62, (2), pp. 662–670.CrossRefGoogle Scholar
Crump, J.E., Schadow, K.C., Yang, V. and Culick, F.E.C. Longitudinal combustion instabilities in ramjet engines: identification of acoustic modes, J Propul Power, 1986, 2, (2), pp. 105–109.CrossRefGoogle Scholar
Taamallah, S., LaBry, Z.A., Shanbhogue, S.J. and Ghoniem, A.F. Thermo-acoustic instabilities in lean premixed swirl-stabilized combustion and their link to acoustically coupled and decoupled flame macrostructures, Proc Combust Inst, 2015, 35, (3), pp. 3273–3282.Google Scholar
Yoon, J., Joo, S., Kim, J., Lee, M.C., Lee, J.G. and Yoon, Y. Effects of convection time on the high harmonic combustion instability in a partially premixed combustor, Proc Combust Inst, 2017, 36, (3), pp. 3753–3761.CrossRefGoogle Scholar
Venkataraman, K.K., Preston, L.H., Simons, D.W., Lee, B.J., Lee, J.G. and Santavicca, D.A., Mechanism of combustion instability in a lean premixed dump combustor, J Propul Power, 1999, 15, (6), pp. 909–918.CrossRefGoogle Scholar
Park, J. and Lee, M.C. Combustion instability characteristics of H2/CO/CH4 syngases and synthetic natural gases in a partially-premixed gas turbine combustor: Part I-frequency and mode analysis, Int J Hydrogen Energy, 2016, 41, (18), pp. 7484–7493.CrossRefGoogle Scholar
Allison, P.M., Driscoll, J.F. and Ihme, M. Acoustic characterization of a partially premixed gas turbine model combustor: syngas and hydrocarbon fuel comparisons, Proc Combust Inst, 2013, 34, (2), pp. 3145–3153.CrossRefGoogle Scholar
Ahn, K. and Yu, K.H. Effects of Damköhler number on vortex-flame interaction, Combust Flame, 2012, 159, (2), pp. 686–696.CrossRefGoogle Scholar
Hwang, D. and Ahn, K. A study on heat release fluctuation using various hydrocarbon fuels, J Korean Soc Propul Eng, 2016, 20, (6), pp. 1–10.CrossRefGoogle Scholar
Sterling, J.D. Longitudinal mode combustion instabilities in air breathing engines, California Institute of Technology, 1987, Pasadena, C.A, USA.Google Scholar
Göttgens, J., Mauss, F. and Peters, N. Analytic approximations of burning velocities and flame thicknesses of lean hydrogen, methane, ethylene, ethane, acetylene and propane flames, Proc Combust Inst, 1992, 24, (1), pp. 129–135.CrossRefGoogle Scholar
Lieuwen, T.C. Experimental investigation of limit-cycle oscillations in an unstable gas turbine combustor, J Propul Power, 2002, 18, (1), pp. 61–67.Google Scholar
Ahn, K., Yu, K. and Yoon, Y. Experimental study on combustion instability in a dump combustor, J Korean Soc Aeronautl Space Sci, 2006, 34, (12), pp. 35–40.Google Scholar
Hurle, I.R., Price, R.B., Sugden, T.M. and Thomas, A. Sound emission from open turbulent premixed flames, Proc Royal Soc A, 1968, 303, pp. 409–427.Google Scholar
Langhorne, P.J. Reheat buzz: an acoustically coupled combustion instability. Part 1. experiment, J Fluid Mech, 1988, 193, pp. 417–443.CrossRefGoogle Scholar
Altay, H.M., Speth, R.L., Hudgins, D.E. and Ghoniem, A.F. The impact of equivalence ratio oscillations on combustion dynamics in a backward-facing step combustor, Combust Flame, 2009, 156, (11), pp. 2106–2116.Google Scholar