Wind-turbine blade and method for reducing noise in wind turbine
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United States of America Patent
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Mar 8, 2011
Grant Date -
Nov 20, 2008
app pub date -
May 14, 2007
filing date -
May 14, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
Low-noise wind turbine blades are provided wherein metallic and/or polymeric cellular materials that are capable of bearing directional loads are used in the construction of wind turbine blade parts or entire sections. The use of such materials influences the air flow over them in such a way that the resulting boundary-layer turbulence is damped in a controlled way, thus weakening the noise scattering mechanism at the trailing edge, and the scattered acoustic waves are absorbed and attenuated by the material acting as an acoustic liner.
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