发明名称 |
High performance low noise helicopter blade aerodynamic design |
摘要 |
<p>A main rotor helicopter blade is presented for generating higher lift with less drag and delaying stall at high Mach numbers using aft camber. The difference between a chord line (1250) of the cross-section and a camber line (1260) of the cross-section increases from a leading edge (1210) of the cross-section to a maximum (1290) between the leading edge and a midpoint (1270) of the chord line and decreases to a trailing edge (1220) of the cross-section, wherein a slope of the difference sequentially decreases from the leading edge to the maximum, increases negatively from the maximum, decreases negatively, and increases negatively to the trailing edge, the latter optionally via a further negative decrease, to produce the aft camber of the blade.</p> |
申请公布号 |
EP2457827(A2) |
申请公布日期 |
2012.05.30 |
申请号 |
EP20120156754 |
申请日期 |
2007.08.03 |
申请人 |
BELL HELICOPTER TEXTRON INC. |
发明人 |
AGNIHOTRI, ASHOK, K.;NARRAMORE, JIMMY, C.;SCHILLINGS, JOHN, J. |
分类号 |
B64C27/467 |
主分类号 |
B64C27/467 |
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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