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Aircraft comprising at least one net for reducing aerodynamic noise from a structural element of said aircraft

An aerodynamic and aircraft technology, applied in the field of aircraft, can solve problems such as loss, reduction of aerodynamic noise intensity, damage to aircraft performance, etc.

Inactive Publication Date: 2012-10-03
AIRBUS OPERATIONS (SAS)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the turbulent flows through the net are disrupted such that these turbulent flows lose a major part of their energy, resulting in a reduction in the intensity of aerodynamic noise
[0004] However, the presence of such noise-reducing nets on structural elements can substantially impair the performance of the aircraft during certain flight phases, especially those in which noise reduction is not essential (eg: cruising flight)

Method used

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  • Aircraft comprising at least one net for reducing aerodynamic noise from a structural element of said aircraft
  • Aircraft comprising at least one net for reducing aerodynamic noise from a structural element of said aircraft
  • Aircraft comprising at least one net for reducing aerodynamic noise from a structural element of said aircraft

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Embodiment Construction

[0027] According to the first embodiment of the present invention, in figure 1 and figure 2 A wing 1 is shown in , comprising a leading-edge slat 2 and a trailing-edge flap 3, both movable.

[0028] Such as figure 2 As shown, the slat 2 is shown in solid lines when it is fully deployed and in dashed lines when it is in a partially deployed position.

[0029] In the fully deployed position, the air flow (indicated by arrow E) around the slat 2 creates a region of turbulence T near the downstream portion of the slat. The upstream portion 4 of the wing 1 lying on the downstream extension of the deployed slat 2 is thus at least partially in the turbulence zone T. The interaction of the turbulent flow with the upstream part 4 of the wing 1 causes aerodynamic noise, which is especially undesirable during approach or take-off phases.

[0030] According to the invention, in order to at least partly reduce said undesired aerodynamic noise, between the upstream part 4 of the wing ...

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Abstract

The invention relates to an aircraft comprising at least one net for reducing aerodynamic noise from a structural element of said aircraft. According to the invention, the flexible net (5A) associated with the structural element (2) is retractable and capable of occupying at least one position located between the following two end positions: a deployed position, in which the net is placed in a turbulence area (T), and a retracted position, in which said net (5A) is at least partially outside said turbulence area (T).

Description

technical field [0001] The invention relates to an aircraft comprising at least one net for reducing aerodynamic noise generated by structural elements of said aircraft when the aircraft is moving. Background technique [0002] It is known that on an aircraft (e.g. transport aircraft) there are a number of fixed structural elements (e.g. hangers, wings, etc.) or movable structural elements (e.g. slats, trailing edge flaps, Noise source caused by air flow from air brakes, etc.). In fact, the interaction of this air flow with the structural element constitutes a turbulent zone in the vicinity of the downstream portion of said element, which alone or through interaction with other subsidiary structural elements arranged by the aircraft in said turbulent zone produces undesired Expected aerodynamic noise. [0003] In order to reduce the intensity of the noise generated, it is known to arrange a mesh with geometric mesh in the region of turbulence in the vicinity of the downstr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C23/00
CPCB64C23/005Y02T50/166B64C2230/14Y02T50/10
Inventor J-F.皮耶S.佩兰德克鲁N.莫兰B.卡吕耶
Owner AIRBUS OPERATIONS (SAS)
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