AIRFOIL FOR FAN BLADE
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United States of America Patent
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Issued Date -
Feb 5, 2015
app pub date -
Apr 2, 2013
filing date -
Apr 3, 2012
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Abstract
A fan blade comprises an airfoil profile having a lower surface, an upper surface, a trailing edge, and a leading edge. The lower surface comprises a concave portion which is defined by a first ellipse. The upper surface comprises a convex portion which is defined by a second ellipse. The leading edge and the trailing edge are of a substantially convex shape and transition the concave shape of the lower surface to the convex shape of the upper surface. A maximum thickness of the airfoil profile is defined at a point along the airfoil profile proximal to the leading edge of the fan blade. A chord length is defined as a lineal distance between an outermost point of the leading edge and an outermost point of the trailing edge. The dimensions of the airfoil profile, including those of the first ellipse and second ellipse, are functions of the chord length.
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