发明名称 |
Noise reduction means for prop-fan |
摘要 |
A prop-fan of the type having a high solidity factor (1 or greater) near the root fairing to a lower solidity factor (less than 1) near the tip and operable over a critical Mach No. range is designed for sound suppression by contouring the tip so that its sweep and sweep distribution of the leading and trailing edge bears a judicious relationship with the Mach surface. This feature is obtainable by designing the planform from a prescribed linearized or non-linearized acoustic theory and tailoring in the sweep so that the leading and trailing edges fall behind the Mach surface.
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申请公布号 |
US4370097(A) |
申请公布日期 |
1983.01.25 |
申请号 |
US19790058046 |
申请日期 |
1979.07.16 |
申请人 |
UNITED TECHNOLOGIES CORPORATION |
发明人 |
HANSON, DONALD B.;METZGER, FREDERICK B. |
分类号 |
B64C11/00;B64C11/16;B64C11/18;(IPC1-7):B64C11/18 |
主分类号 |
B64C11/00 |
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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