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http://dx.doi.org/10.3795/KSME-B.2005.29.1.095

A Numerical Study on Acoustic Behavior in Gas Turbine Combustor with Acoustic Resonator  

Park, I-Sun (조선대학교 대학원 항공우주공학과)
Sohn, Chae-Hoon (조선대학교 항공우주공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.29, no.1, 2005 , pp. 95-102 More about this Journal
Abstract
Acoustic behavior in gas turbine combustor with acoustic resonator is investigated numerically by adopting linear acoustic analysis. Helmholtz-type resonator is employed as acoustic resonator to suppress acoustic instability passively. The tuning frequency of acoustic resonator is adjusted by varying its length. Through harmonic analysis, acoustic-pressure responses of chamber to acoustic excitation are obtained and the resonant acoustic modes are identified. Acoustic damping effect of acoustic resonator is quantified by damping factor. As the tuning frequency of acoustic resonator approaches the target frequency of the resonant mode to be suppressed. mode split from the original resonant mode to lower and upper modes appears and thereby complex patterns of acoustic responses show up. Considering mode split and damping effect as a function of tuning frequency, it is desirable to make acoustic resonator tuned to broad-band frequencies near the maximum frequency of those of the possible upper modes.
Keywords
Acoustic Resonator; Acoustic Analysis; Acoustic Instability; Damping Factor;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 Camporeale, S. M., Forte, A., Fortunato, B., Mastrovito, M. and Ferrante, A., 2004, 'Numerical Simulation of the Acoustic Pressure Field in an Annular Combustion Chamber with Helmholtz Resonators,' ASME paper GT2004-54139
2 Chapra, S. C. and Canale, R. P., 1989, Numerical Methods for Engineers, 2nd ed., McGraw-Hill, Singapore
3 ANSYS User's Manual for revision 5.0, 1993, Volume IV, Theory, Swanson Analysis Systems, Inc., Houston, PA
4 Sohn, C. H., 2002, 'A Numerical Study on Acoustic Behavior in Baffled Combustion Chambers,' Transcations of the KSME(B), Vol. 26, No.7, pp. 966-975   DOI
5 Sohn, C. H. and Kim, Y.-M., 2002, 'A Numerical Study on Acoustic Behavior in Combustion Chambers with Acoustic Cavity,' Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 30, No.4, pp. 28-37   DOI
6 Laudien, E., Pongratz, R, Pierro, R. and Preclick, D., 1995, in Liquid Rocket Engine Combustion Instability (V. Yang, and W. E. Anderson, eds.), Progress in Astronautics and Aeronautics, Vol. 169, AIAA, Washington DC, pp. 377-399
7 Oberg, C. L., 1971, 'Combustion Stabilization with Acoustic Cavities,' Journal of Spacecraft and Rockets, Vol. 8, No. 12, pp. 1220-1225   DOI
8 Sohn, C. H. and Cho, H. C, 2004, 'Numerical Analysis of Acoustic Characteristics in Gas Turbine Combustor with Spatial Non-homogeneity,' KSME International Journal, Vol. 18, No.8, pp. 1461-1469
9 Zucrow, M. J. and Hoffman, J. D, 1977, Gas Dynamics, Vol. II, John Wiley & Sons, Inc., New York
10 Lefebvre, A. H., 1998, Gas Turbine Combustion, 2nd Ed., Taylor & Francis
11 Harrje, D. J. and Reardon, F. H. (eds.), 1972, Liquid Propellant Rocket Combustion Instability, NASA SP-I94
12 NASA, 1974, Liquid Rocket Engine Combustion Stabilization Devices, NASA SP-8113