In gas and steam turbine applications a common approach to prevent the blades from high cycle fatigue failures due to high vibration amplitudes is the usage of friction damping elements. Besides the intended amplitude reduction this procedure also features some possibly unwanted side effects like a shift in resonance frequencies due to stiffening effects caused by the contact. Thus, as an alternative an eddy current based non-contacting damping concept for the application in turbo machinery is investigated. In this paper two different types of eddy current dampers are considered. Theoretical models for both are established by applying electromagnetic-mechanical theory. The theoretical models are compared to forced response measurements that are performed at a stationary test rig.
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ASME Turbo Expo 2009: Power for Land, Sea, and Air
June 8–12, 2009
Orlando, Florida, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4887-6
PROCEEDINGS PAPER
Eddy Current Damping: A Concept Study for Steam Turbine Blading
Jacob Laborenz,
Jacob Laborenz
Leibniz Universita¨t Hannover, Hannover, Germany
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Christian Siewert,
Christian Siewert
Leibniz Universita¨t Hannover, Hannover, Germany
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Lars Panning,
Lars Panning
Leibniz Universita¨t Hannover, Hannover, Germany
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Jo¨rg Wallaschek,
Jo¨rg Wallaschek
Leibniz Universita¨t Hannover, Hannover, Germany
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Christoph Gerber,
Christoph Gerber
ALSTOM Power, Baden, Switzerland
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Pierre-Alain Masserey
Pierre-Alain Masserey
ALSTOM Power, Baden, Switzerland
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Jacob Laborenz
Leibniz Universita¨t Hannover, Hannover, Germany
Christian Siewert
Leibniz Universita¨t Hannover, Hannover, Germany
Lars Panning
Leibniz Universita¨t Hannover, Hannover, Germany
Jo¨rg Wallaschek
Leibniz Universita¨t Hannover, Hannover, Germany
Christoph Gerber
ALSTOM Power, Baden, Switzerland
Pierre-Alain Masserey
ALSTOM Power, Baden, Switzerland
Paper No:
GT2009-59593, pp. 333-342; 10 pages
Published Online:
February 16, 2010
Citation
Laborenz, J, Siewert, C, Panning, L, Wallaschek, J, Gerber, C, & Masserey, P. "Eddy Current Damping: A Concept Study for Steam Turbine Blading." Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea, and Air. Volume 6: Structures and Dynamics, Parts A and B. Orlando, Florida, USA. June 8–12, 2009. pp. 333-342. ASME. https://doi.org/10.1115/GT2009-59593
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