Drain particularly for engine support strut
View Patent ↗A drain, for example for an aircraft engine support strut, arranged on the trailing edge of the rear secondary structure of the strut. The drain includes a conduit with a substantially horizontal axis and a substantially rectangular cross-section, taken in a plane parallel to the trailing edge, the conduit closed at an outer extremity by a terminal portion with a substantially ogival cross-section taken in the axis of the conduit and including at least one opening for drainage with an elongated shape on at least one of the opposing lateral walls.
1. A drain for an aircraft engine support strut, arranged on a trailing edge of a rear secondary structure of the strut, comprising:
a conduit having a substantially horizontal axis, and a substantially rectangular cross-section taken in a plane parallel to the trailing edge,
wherein the conduit is closed at an outer extremity by a terminal portion having a substantially ogival cross-section taken in the transverse axis of the conduit
and wherein the conduit includes at least one drainage aperture having an elongated shape on at least one of two opposing lateral walls,
wherein said at least one aperture extends substantially an entire vertical distance on said at least one of two opposing lateral walls.
2. A drain according to claim 1 , wherein the conduit is substantially symmetric with respect to a vertical plane containing the trailing edge.
3. A drain according to claim 1 , wherein the conduit includes two drainage apertures having elongated shapes and arranged on the two opposing lateral walls, wherein a major axis of each drainage aperture is substantially parallel to the trailing edge.
4. A drain according to claim 3 , wherein the drainage apertures are substantially symmetric.
5. A drain according to claim 1 , wherein the at least one drainage aperture is arranged proximate an area of the trailing edge of the rear secondary structure, upstream of the terminal portion.
6. A drain according to claim 1 , wherein a width of the at least one drainage aperture is in the range of about 10 millimeters to about 20 millimeters.
7. A drain according to claim 6 , wherein a ratio between a length of the substantially rectangular cross-section of the conduit taken in a plane substantially parallel to the trailing edge and a width of the substantially rectangular cross-section is in the range of about 1 to about 10.
8. A drain according to claim 6 , wherein the at least one drainage aperture is defined in the direction of the width between an edge of the at least one opposing lateral wall and an edge of a part of the terminal portion having a substantially ogival cross-section, the part directed towards an interior of the drain to define a plane of accelerating aerodynamic flow along at least a length of the at least one opposing lateral wall.
9. A drain according to claim 8 , wherein the part forms an angle of about 30 degrees with a tangent to an adjacent part of the terminal portion.