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On the Performance of Porous Sound Absorbent Ceramic Lining in a Combustion Chamber Test Rig

[+] Author Affiliations
Hans-Christoph Ries, Mateus Vieira Carlesso, Christian Eigenbrod, Stephen Kroll, Kurosch Rezwan

University of Bremen, Bremen, Germany

Paper No. GT2013-95492, pp. V004T02A008; 6 pages
doi:10.1115/GT2013-95492
From:
  • ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
  • Volume 4: Ceramics; Concentrating Solar Power Plants; Controls, Diagnostics and Instrumentation; Education; Electric Power; Fans and Blowers
  • San Antonio, Texas, USA, June 3–7, 2013
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5518-8
  • Copyright © 2013 by ASME

abstract

This paper discusses the potential of using porous ceramic lining as insulating material in combustion chambers with respect to their sound absorbent ability to suppress thermoacoustic instabilities. For this purpose a combustion chamber test rig was developed and different types of ceramic linings were tested. The examined range of power was between 40 and 250 kW and the air-propane equivalence ratio was between 1.2 and 2.0. The overall sound pressure level and frequency domain of a lean premixed swirl stabilized and piloted burner are presented. The resonance frequencies and sound pressure levels are obtained and compared for the different combustion chamber linings. The results show a significant decrease in overall sound pressure level by up to 23.5 dB for sound absorbent lining in comparison to the common sound reflecting combustion chamber lining. In summary, sound absorbent ceramic combustion chamber lining can contribute to improve the stability of lean premixed gas turbines.

Copyright © 2013 by ASME

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