发明名称 |
Airfoil blade |
摘要 |
An improved airfoil blade for aircraft propellers and the like which exhibits high aerodynamic performance and low far and near field noise levels at a minimum weight is provided with a novel high lift and high lift to drag cross-sectional airfoil shape characterized by a blunt, generally parabolic leading edge portion (10) which fairs into a pressure surface (15) characterized by a leading convex portion (20). For thickness ratios less than approximately 0.15, the pressure surface includes a concave trailing portion (25) at one end thereof, fairing into the leading convex portion (20) and at the other end thereof, terminating at a blunt trailing edge (35). The leading edge portion also fairs into a suction surface (30) which is convex along substantially the entire length thereof to the blade trailing edge.
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申请公布号 |
US4519746(A) |
申请公布日期 |
1985.05.28 |
申请号 |
US19810286484 |
申请日期 |
1981.07.24 |
申请人 |
UNITED TECHNOLOGIES CORPORATION |
发明人 |
WAINAUSKI, HARRY S.;ROHRBACH, CARL |
分类号 |
B63H1/26;B64C3/14;B64C11/18;F01D5/14;(IPC1-7):B64C11/18 |
主分类号 |
B63H1/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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