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Helicopters with transverse ducts

A helicopter and lateral technology is applied in the field of helicopters to reduce production and maintenance costs, improve impression, and improve design.

Active Publication Date: 2016-05-25
AIRBUS HELICOPTERS DEUT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second effect involves broadband interaction noise of the stator due to turbulent flow out of the rotor, producing randomly fluctuating lift forces on the stator

Method used

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  • Helicopters with transverse ducts
  • Helicopters with transverse ducts
  • Helicopters with transverse ducts

Examples

Experimental program
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Embodiment Construction

[0038] figure 1 A transverse ducted tail 1 of a helicopter (not shown) is shown. The transverse ducted tail 1 includes a cover 3 , a buffer 4 and a wing 5 . The transverse ducted tail 1 also includes an anti-torque device 2 configured to resist the torque generated by the rotation of the main rotor of the helicopter, so as to keep the helicopter in balance when yawing. The anti-torque device 2 is supported in a transverse duct 6 which extends through the cover 3 of the tail section 1 .

[0039] The transverse duct 6 is substantially circular and comprises a rotor, a rotor plane being defined by rotor blades 13 . Air flows through the transverse ducts 6 of the anti-torque device 2 .

[0040] The anti-torque device 2 comprises a stator with stator blades 16 , 17 , a drive shaft fairing 14 and a gearbox fairing 15 .

[0041] Ten rotor blades 13 are attached to a rotor hub 12 having a rotor axis. The ten rotor blades 13 are distributed on the rotor hub 12 at a non-uniform ang...

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Abstract

A helicopter having a longitudinal axis and having a tail (1) with a transverse duct (6) and a drive shaft (23) inside a drive shaft fairing (14) for An aerodynamically and acoustically optimized anti-torque device (2) is supported in said transverse duct (6). The helicopter can improve the noise characteristics of the helicopter with the transverse duct, especially can further improve the noise characteristics of the helicopter with the transverse duct in various flight states.

Description

technical field [0001] The invention relates to a helicopter with the preamble features of claim 1 , having an anti-torque device supported in a transverse duct. Such anti-torque devices mounted in transverse ducts are known as so-called ducted tail rotors. Background technique [0002] Growing ecological awareness has led to increased attention to the further improvement of helicopter components, especially in the specific case of transverse ducting based on anti-torque systems, and increasing public awareness of direct The purpose of improving the acceptance of the aircraft. [0003] In order to understand the phenomenon of rotor-stator interaction, and in particular to predict the tonal noise due to wake interaction, knowledge of the cyclic loads generated on the stator blades of the anti-torque device is required. Usually two different effects are considered. The first effect involves periodic viscous wake velocity defects where the rotor blades are intercepted by the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C27/82
CPCB64C27/82B64C2027/8254
Inventor S·施奈德D·施密克C·韦勒
Owner AIRBUS HELICOPTERS DEUT GMBH
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