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US 10,894,594 B2Granted
Aircraft including a wing with improved acoustic treatment
AssigneeSafran Aircraft Engines
InventorsNorman Bruno Andre Jodet, Jean-Michel Boiteux, Jacky Novi Mardjono
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Abstract
An aircraft including a wing and an aeroengine having a longitudinal main axis and including a ducted nacelle with at least one fan is disclosed. The wing includes an acoustic treatment surface on a bottom portion of its outer shell on either side of the longitudinal main axis and over a width perpendicular to the longitudinal main axis that is not greater than three times the diameter of the fan. The acoustic treatment surface includes a layer of porous material for attenuating acoustic waves coming from the fan.
Claims9
An aircraft comprising:
- a wing;
- and
- an aeroengine with a longitudinal main axis and including a ducted nacelle containing a fan,
- wherein for attenuating acoustic waves coming from said fan, the wing includes an acoustic treatment surface on a bottom portion of an outer shell of the wing on either side of said longitudinal main axis and over a width perpendicular to said longitudinal main axis that is no greater than three times a diameter of said fan, the acoustic treatment surface comprising a layer of porous material that reconstitutes an aerodynamic profile of the wing, and
- wherein said width lies in a range of one-half times the diameter of the fan to two times the diameter of the fan, and a maximum width L is given by the following formula:
- L=2D/tan(α)
- with:
- D being the diameter of the fan;
- and
- a being an acoustic wave propagation angle lying in a range of 33° to 34°.
7 more elements
Dependencies are inferred from the claim text.