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Helicopter with transverse duct

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

Active Publication Date: 2014-01-01
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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  • Helicopter with transverse duct
  • Helicopter with transverse duct
  • Helicopter with transverse duct

Examples

Experimental program
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Effect test

Embodiment Construction

[0030] 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 .

[0031] 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 .

[0032] The anti-torque device 2 comprises a stator with stator blades 16 , 17 , a drive shaft fairing 14 and a gearbox fairing 15 .

[0033] 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 angle...

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Abstract

The invention is related to a helicopter with a longitudinal axis and with a tail portion (1) with a transverse duct (6) and a drive shaft (23) inside a drive shaft fairing (14) for an aerodynamic and acoustic optimized counter-torque device (2) supported within said transverse duct (6).

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. Said 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 Applications(China)
IPC IPC(8): B64C27/82
CPCB64C2027/8254B64C27/82
Inventor S·施奈德D·施密克C·韦勒
Owner AIRBUS HELICOPTERS DEUT GMBH
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