Apparatus for obstructing air flow through an aperture for a duct in an aircraft wing
Apparatus for obstructing air flow through an aperture in an aircraft wing where a movable anti-icing duct extends through the aperture are disclosed. An exemplary apparatus comprises a base member ( 40 ) configured to be secured to the duct and a first seal member ( 42 ) configured to obstruct air flow through the aperture. The first seal member comprises a proximal portion ( 42 A) connected to the base member and a distal portion ( 42 B) configured to movably contact an inner surface of a skin of the wing. The use of such apparatus may reduce the amount of leakage flow from the high pressure lower wing surface to the low pressure upper wing surface through the aperture and thereby reduce the loss of lift associated with such leakage flow.
1. An apparatus for obstructing air flow through an aperture in an aircraft wing where a movable duct extends through the aperture, the apparatus comprising:
a base member configured to be secured to the duct and to partially wrap around the duct so as to straddle the duct, the base member conforming to a cylindrical shape of the duct; and
a first seal member having a flap configuration and configured to obstruct air flow through the aperture, the first seal member comprising a proximal portion connected to the base member and a distal portion configured to movably contact an inside structure of a skin of the wing,
the distal portion of the first seal being flexibly movable between a first position and a second position relative to the base member, the first and second positions of the distal portion of the first seal member being associated with first and second positions of the duct.
2. The apparatus as defined in claim 1 , wherein the distal portion of the first seal member is resiliently movable to the first and second positions of the distal portion of the first seal member.
3. The apparatus as defined in claim 1 , wherein the base member and the first seal member are integrally formed.
4. The apparatus as defined in claim 1 , wherein the base member and the first seal member are made of a same material.
5. The apparatus as defined in claim 1 , wherein the cylindrical shape of the duct has a substantially circular cross-sectional profile.
6. The apparatus as defined in claim 1 , comprising a strap for securing the base member to the duct.
7. The apparatus as defined in claim 1 , comprising a second seal member connected to the base member for obstructing air flow through the aperture.
8. The apparatus as defined in claim 7 , wherein the second seal member is configured to movably contact a side wall that is part of the aircraft wing and adjacent the duct.
9. The apparatus as defined in claim 7 , wherein the second seal member has an elongated shape that extends substantially parallel to a longitudinal axis of the duct.
10. The apparatus as defined in claim 7 , wherein the second seal member has a tubular configuration.
11. The apparatus as defined in claim 7 , wherein the second seal member is integrally formed with the base member.
12. The apparatus as defined in claim 1 , comprising two second seal members connected to the base member for obstructing air flow through the aperture.
13. The apparatus as defined in claim 12 , wherein the second seal members are configured to movably contact respective side walls that are part of the aircraft wing and disposed on opposite sides of the duct.
14. The apparatus as defined in claim 12 , wherein the second seal members each have an elongated shape that extends substantially parallel to a longitudinal axis of the duct.
15. The apparatus as defined in claim 12 , wherein each second seal member has a tubular configuration.
16. The apparatus as defined in claim 12 , wherein the second seal members are integrally formed with the base member.
17. The apparatus as defined in claim 1 , wherein the base member and the first seal member comprise an elastomeric material.
18. An aircraft wing assembly comprising:
a fixed structure having a skin defining an aerodynamic surface, the skin having an aperture formed therein;
an aerodynamic device movably connected to the fixed structure;
a duct extending between the fixed structure and the aerodynamic device and through the aperture formed in the skin, the duct being configured to accommodate movement of the aerodynamic device relative to the fixed structure; and
an apparatus for obstructing air flow through the aperture formed in the skin, the apparatus comprising:
a base member secured to the duct and partially wrapping around the duct so as to straddle the duct, the base member conforming to a cylindrical shape of the duct; and
a first seal member having a flap configuration and configured to obstruct air flow through the aperture, the first seal member comprising a proximal portion connected to the base member and a distal portion configured to movably contact an inside structure of the skin the wing,
the distal portion of the first seal being flexibly movable between a first position and a second position relative to the base member, the first and second positions of the distal portion of the first seal member being associated with first and second positions of the duct.
19. The aircraft wing assembly as defined in claim 18 , wherein the duct is a telescopic duct.
20. The apparatus as defined in claim 1 , wherein the duct is a telescopic duct.