复合直升机优化设计

小羚羊 · 发表于 2013-6-16 12:18:49

Optimum Design of a Compound Helicopter
Hyeonsoo Yeo
Aeroflightdynamics Directorate (AMRDEC)
U.S. Army Research, Development, and Engineering Command
Ames Research Center, Moffett Field, California
Wayne Johnson
Flight Vehicle Research and Technology Division
NASA Ames Research Center
Moffett Field, California

Abstract
A design and aeromechanics investigation was conducted for a 100,000-lb compound helicopter with a
single main rotor, which is to cruise at 250 knots at 4000 ft/95 deg F condition. Performance, stability, and
control analyses were conducted with the comprehensive rotorcraft analysis CAMRAD II. Wind tunnel test
measurements of the performance of the H-34 and UH-1D rotors at high advance ratio were compared with
calculations to assess the accuracy of the analysis for the design of a high speed helicopter. In general, good
correlation was obtained when an increase of drag coefficients in the reverse flow region was implemented.
An assessment of various design parameters (disk loading, blade loading, wing loading) on the performance
of the compound helicopter was conducted. Lower wing loading (larger wing area) and higher blade loading
(smaller blade chord) increased aircraft lift-to-drag ratio. However, disk loading has a small influence on
aircraft lift-to-drag ratio. A rotor parametric study showed that most of the benefit of slowing the rotor
occurred at the initial 20 to 30% reduction of the advancing blade tip Mach number. No stability issues were
observed with the current design. Control derivatives did not change significantly with speed, but the did
exhibit significant coupling.

下一个信念 · 发表于 2013-6-16 13:51:44

没有内容？？？

ColVincent · 发表于 2013-6-19 08:56:10

英文的亚历山大

小羚羊 · 发表于 2013-9-5 20:07:25

下一个信念:没有内容？？？ (2013-06-16 13:51)

内容有的，下载嘛。不行发给我你的邮箱。

小羚羊 · 发表于 2013-9-5 20:08:43

yaairvincent:英文的亚历山大 (2013-06-19 08:56)

虽然我的资料不一定是精华我承认，但是我觉得要想成为一名优秀的机务是必须要多学英语的

上官轩辕 · 发表于 2013-12-1 11:51:50

收藏了，谢谢楼主。

shufflesun · 发表于 2013-12-10 19:46:52

谢谢楼主，辛苦了。

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