Modal tuning for vanes
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United States of America Patent
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Sep 1, 2015
Grant Date -
Aug 1, 2013
app pub date -
Jan 27, 2012
filing date -
Jan 27, 2012
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Abstract
A vane having a cambered airfoil body is frequency-tuned via a number of cavities formed in a surface of the vane. At least some of the cavities are filled with a nonmetallic filler material, and the remainder of the cavities are left unfilled. A cover is affixed to the vane so as to cover at least the unfilled cavities. In an embodiment, the filling and covering of cavities is performed in a manner that excludes the frequency modes of the guide vane from a precluded band, e.g., an engine excitation band.
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