TECHNICAL PAPERS: Gas Turbines: Combustion and Fuel

Detailed Analysis of the Acoustic Mode Shapes of an Annular Combustion Chamber

[+] Author and Article Information
G. Walz, W. Krebs, S. Hoffmann, H. Judith

Siemens AG KWU, Wiesenstr. 35, D-45466 Mülheim, Germany

J. Eng. Gas Turbines Power 124(1), 3-9 (Mar 01, 1999) (7 pages) doi:10.1115/1.1396346 History: Received October 01, 1998; Revised March 01, 1999
Copyright © 2002 by ASME
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Geometry and finite element model of the annual combustor
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Distribution of the speed of sound normalized to its maximum value c0 in the z=0 m plane (CFD calculation (7))
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Selected eigenmodes of the annular combustor with boundary conditions of Problem II. The pictures show the normalized pressure distribution.
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Selected eigenmodes of the annular combustor with boundary conditions of Problem III. The normalized pressure distribution is shown.
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Cross section of the V83.3A gas turbine
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Eigenfrequency spectrum of the cylinder model. The limit curve is given by N=(ω/ω0)3 (see Eq. (4)).
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Examples of eigenmodes of the cylinder model: mode N=29 (left) and N=39 (right). The eigenmodes are characterized by the normalized pressure distribution.



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