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Hybrid method for the prediction of thermo-acoustic waves in an annular gas turbine combustion chamber

Szász, Robert-Zoltán LU ; Duwig, Christophe LU and Fuchs, Laszlo LU (2007) 43rd AIAA/ASMESAE/ASEE Joint Propulsion Conference and Exhibit In AIAA paper no. 2007-5753
Abstract
The acoustic field in an annular gas turbine combustion chamber with thirty burners has been studied using a hybrid approach. The acoustic field was determined by solving an inhomogeneous wave equation. The acoustic sources were provided by a low Mach number flow solver. The main focus was to determine the influence of nonuniform behavior and interactions of neighboring burners. For this reason the acoustic sources of neighboring nozzles were imposed with a time shift. The lowest frequency eigenmodes of the combustion chamber were identified to be the first three azimuthal modes and the time shifts were introduced whereby these modes can be observed easily. The desired modes were induced at the inlet region, whereas further downstream... (More)
The acoustic field in an annular gas turbine combustion chamber with thirty burners has been studied using a hybrid approach. The acoustic field was determined by solving an inhomogeneous wave equation. The acoustic sources were provided by a low Mach number flow solver. The main focus was to determine the influence of nonuniform behavior and interactions of neighboring burners. For this reason the acoustic sources of neighboring nozzles were imposed with a time shift. The lowest frequency eigenmodes of the combustion chamber were identified to be the first three azimuthal modes and the time shifts were introduced whereby these modes can be observed easily. The desired modes were induced at the inlet region, whereas further downstream higher wave-number modes were found to dominate the acoustic field. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
AIAA paper no. 2007-5753
conference name
43rd AIAA/ASMESAE/ASEE Joint Propulsion Conference and Exhibit
external identifiers
  • Scopus:36749025666
language
English
LU publication?
yes
id
6573248b-40c2-4773-beaf-022d75ee4787 (old id 572071)
date added to LUP
2008-02-18 10:50:08
date last changed
2017-01-01 08:13:45
@inproceedings{6573248b-40c2-4773-beaf-022d75ee4787,
  abstract     = {The acoustic field in an annular gas turbine combustion chamber with thirty burners has been studied using a hybrid approach. The acoustic field was determined by solving an inhomogeneous wave equation. The acoustic sources were provided by a low Mach number flow solver. The main focus was to determine the influence of nonuniform behavior and interactions of neighboring burners. For this reason the acoustic sources of neighboring nozzles were imposed with a time shift. The lowest frequency eigenmodes of the combustion chamber were identified to be the first three azimuthal modes and the time shifts were introduced whereby these modes can be observed easily. The desired modes were induced at the inlet region, whereas further downstream higher wave-number modes were found to dominate the acoustic field.},
  author       = {Szász, Robert-Zoltán and Duwig, Christophe and Fuchs, Laszlo},
  booktitle    = {AIAA paper no. 2007-5753},
  language     = {eng},
  title        = {Hybrid method for the prediction of thermo-acoustic waves in an annular gas turbine combustion chamber},
  year         = {2007},
}