Aerodynamic laminar flow structure

Patent metadata

Field	Value
Publication number	US-11459086-B2
Application number	US-202016829314-A
Country	US
Kind code	B2
Filing date	Mar 25, 2020
Priority date	Apr 1, 2019
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

An aerodynamic laminar flow structure comprises a flow body and a leading edge designed to face a flow circulating in a flow direction, the leading edge being movable and comprising a retracted position in which the edge of each of two flow surfaces of the flow body is joined respectively to an edge of each of two flow surfaces of the leading edge along a parting line having at least one portion inclined at an angle strictly less than 90° relative to the flow direction. The inclination of at least one portion of the parting line makes it possible to reduce drag and thus to retain a laminar flow over a major part of the exterior surfaces of the aerodynamic structure.

First claim

The invention claimed is:

1. An aerodynamic laminar flow structure comprising:
a flow body and a leading edge configured to face a flow circulating in a flow direction, the flow body comprising two first flow surfaces, each of the first flow surfaces comprising an edge, the leading edge comprising two second flow surfaces, each of the second flow surfaces comprising an edge, the leading edge being movable alternately between a retracted position, in which the edge of each of the first flow surfaces is joined respectively to an edge of each of the second flow surfaces along a parting line, and a deployed position, in which the edge of each of the first flow surfaces and the edge of each of the second flow surfaces are unjoined,
wherein the parting line has at least one portion inclined at an angle strictly less than 90° relative to the flow direction,
wherein one or both of the edge of each of the first flow surfaces or the edge of each of the second flow surfaces has a rounded crest.

2. The structure according to claim 1 , wherein the parting line has a variable form having a plurality of inclined portions that are repeated in succession.

3. The structure according to claim 1 , wherein the at least one inclined portion is inclined by an angle less than 60° relative to the flow direction.

4. The structure according to claim 1 , wherein the parting line has a variable form corresponding to a sinusoid.

5. The structure according to claim 1 , wherein the parting line has a variable form corresponding to a sawtooth form.

6. The structure according to claim 1 , wherein the parting line has at least two portions inclined at an angle and at least one space between the edge of each of the first flow surfaces and the edge of each of the second flow surfaces, the at least one space being located between the inclined portions of the parting line.

7. The structure according to claim 6 , further comprising an aspiration device configured such as to aspirate at least a portion of the flow through the at least one space.

8. An aircraft comprising at least one aerodynamic laminar flow structure as defined in claim 1 .

Assignees

• Airbus Operations Sas

Inventors

• Farouz-Fouquet Mathias

Classifications

• B64C2003/143

  comprising interior channels · CPC title

• B64C3/28

  Leading or trailing edges attached to primary structures, e.g. forming fixed slots · CPC title

• Y02T50/30

  Wing lift efficiency · CPC title

• B64C9/24 Primary

  by single flap · CPC title

• B64C2003/147

  comprising trailing edges of particular shape · CPC title