Method to maximize resonance-free running range for a turbine blade
OwnerLoc Duong, Ralph E. Gordon +1inventors
InventorsLoc Duong, Ralph E. Gordon, Olivier J. Lamicq
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Abstract
An airfoil for a gas turbine engine component such as a turbine blade is tuned to move its natural frequency outside of a frequency which will be excited during expected speed range of an associated gas turbine engine. The airfoil is tuned about locations of the anti-nodes in an original airfoil design. The tuning affects only the interfered frequency.
Claims10
A method of modifying the natural frequency of an airfoil for a gas turbine engine comprising the steps of:
- a) identifying the natural frequency and identifying whether that frequency will occur during the normal operating speed range of an associated gas turbine engine;
- b) identifying at least one anti-node of the airfoil;
- and
- c) tuning the airfoil about the location of at least one anti-node to move an interfered natural frequency outside the expected operating speed range.
An airfoil for a gas turbine engine that has been tuned to move its natural frequency outside of an expected speed range of an associated gas turbine engine comprising:
- a tuned area on the airfoil at the location of an anti-node.
Dependencies are inferred from the claim text.