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Damping element for reducing the vibration of an airfoil

United States Patent

November 12, 2013
View the Complete Patent at the US Patent & Trademark Office
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An airfoil (10) is provided with a tip (12) having an opening (14) to a center channel (24). A damping element (16) is inserted within the opening of the center channel, to reduce an induced vibration of the airfoil. The mass of the damping element, a spring constant of the damping element within the center channel, and/or a mounting location (58) of the damping element within the center channel may be adjustably varied, to shift a resonance frequency of the airfoil outside a natural operating frequency of the airfoil.
Campbell; Christian X. (Oviedo, FL), Marra; John J. (Winter Springs, FL)
Siemens Energy, Inc. (Orlando, FL)
12/ 613,957
November 6, 2009
STATEMENT REGARDING FEDERALLY SPONSORED DEVELOPMENT Development for this invention was supported in part by Contract No. DE-FC26-05NT42644, awarded by the United States Department of Energy. Accordingly, the United States Government may have certain rights in this invention.