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Title: Damping element for reducing the vibration of an airfoil

Patent ·
OSTI ID:1108601
;

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.

Research Organization:
Siemens Energy, Inc, Orlando, FL, USA
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-05NT42644
Assignee:
Siemens Energy, Inc. (Orlando, FL)
Patent Number(s):
8,579,593
Application Number:
12/613,957
OSTI ID:
1108601
Country of Publication:
United States
Language:
English

References (8)

System for fastening a hollow extruded blade for an axial-flow fan to the inserted shank of the blade patent March 1995
Method of making a SPF/DB hollow core fan blade patent January 1995
Airfoil vibration damping device patent October 1998
Sports implement swing analyzer patent October 1991
Blade baffle damper patent June 1976
Damped turbine engine frame patent February 1994
Gas turbine engine blade patent February 2003
Damped aerofoil structure patent October 2006

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