Perforated liners, especially in combination with a bias flow, are very effective sound absorbers. When appplied to gas turbine combustors, they can suppress thermo-acoustic instabilities and thus allow the application of new combustion concepts concerning higher efficiency and lower emissions. While the successful application of such a damping concept has been shown, it is still not possible to accurately predict the damping performance of a given configuration. This paper provides a comprehensive database of high quality experimental data. Variations of geometric, fluid mechanic, and acoustic parameters have been studied, including realistic engine configurations. The results demonstrate each parameter influence on the damping performance. A low order thermo-acoustic model is used to simulate the test configurations numerically. The model shows a good agreement with the measurements for a wide range of geometries and Strouhal and bias flow Mach numbers.
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September 2011
Research Papers
Establishment of a High Quality Database for the Acoustic Modeling of Perforated Liners
Claus Lahiri,
Claus Lahiri
Institute of Propulsion Technology,
German Aerospace Center (DLR)
, 10623 Berlin, Germany
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Lars Enghardt,
Lars Enghardt
Institute of Propulsion Technology,
German Aerospace Center (DLR)
, 10623 Berlin, Germany
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Friedrich Bake,
Friedrich Bake
Institute of Propulsion Technology,
German Aerospace Center (DLR)
, 10623 Berlin, Germany
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Sermed Sadig,
Sermed Sadig
Combustor Aerothermal and Cooling,
Rolls-Royce Deutschland Ltd. & Co. KG
, 15827 Dahlewitz, Germany
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Miklós Gerendás
Miklós Gerendás
Combustor Aerothermal and Cooling,
Rolls-Royce Deutschland Ltd. & Co. KG
, 15827 Dahlewitz, Germany
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Claus Lahiri
Institute of Propulsion Technology,
German Aerospace Center (DLR)
, 10623 Berlin, Germany
Lars Enghardt
Institute of Propulsion Technology,
German Aerospace Center (DLR)
, 10623 Berlin, Germany
Friedrich Bake
Institute of Propulsion Technology,
German Aerospace Center (DLR)
, 10623 Berlin, Germany
Sermed Sadig
Combustor Aerothermal and Cooling,
Rolls-Royce Deutschland Ltd. & Co. KG
, 15827 Dahlewitz, Germany
Miklós Gerendás
Combustor Aerothermal and Cooling,
Rolls-Royce Deutschland Ltd. & Co. KG
, 15827 Dahlewitz, GermanyJ. Eng. Gas Turbines Power. Sep 2011, 133(9): 091503 (9 pages)
Published Online: April 20, 2011
Article history
Received:
August 5, 2010
Revised:
September 24, 2010
Online:
April 20, 2011
Published:
April 20, 2011
Citation
Lahiri, C., Enghardt, L., Bake, F., Sadig, S., and Gerendás, M. (April 20, 2011). "Establishment of a High Quality Database for the Acoustic Modeling of Perforated Liners." ASME. J. Eng. Gas Turbines Power. September 2011; 133(9): 091503. https://doi.org/10.1115/1.4002891
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