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US 8,291,710 B2Granted
Gas turbine engine exhaust nozzle having a composite article having a shape memory material member
AssigneeROLLS-ROYCE plc
InventorJohn Richard Webster
Life of this patent
Estimating the term…
Abstract
A composite article includes a composite member, a flexible member and at least one shape memory material member. The composite member has longitudinally extending fibers in a matrix material. The at least one shape memory material member extends substantially parallel to the composite member and the flexible member is positioned between the composite member and the at least one shape memory material member to bond the at least one shape memory material member to the composite member. The composite article is particularly suitable for use as a tab for an exhaust nozzle of a turbofan gas turbine engine.
Claims25
A gas turbine engine comprising:
- an exhaust nozzle, the exhaust nozzle having a downstream end;
- at least one tab extending in a downstream direction from the downstream end of the exhaust nozzle, the tab having a composite article, with a composite member, a flexible member, and at least one shape memory material member,
- the at least one shape memory material member extending substantially parallel to the composite member and the flexible member being positioned between the composite member and the at least one shape memory material member to bond the at least one shape memory material member to the composite member and to maintain a separation between the composite member and the at least one shape memory material member,
- the at least one shape memory material member having an actuator to move the tab between a second non-deployed position and first deployed position, the composite member opposing actuation of the at least one shape memory material member.
1 more element
A gas turbine engine comprising:
- an exhaust nozzle, the exhaust nozzle having a downstream end;
- at least one tab extending in a downstream direction from the downstream end of the exhaust nozzle, the tab having a composite article, with a composite member, a flexible member, and at least one shape memory material member,
- the at least one shape memory material member extending substantially parallel to the composite member and the flexible member being positioned between the composite member and the at least one shape memory material member to bond the at least one shape memory material member to the composite member and to maintain a separation between the composite member and the at least one shape memory material member,
- the at least one shape memory material member being embedded in the flexible member,
- the at least one shape memory material member having an actuator to move the tab between a second non-deployed position and first deployed position, and
- a heat conducting member being provided around the shape memory material member,
- wherein the heat conducting member is embedded in the flexible member and extends to an exterior surface of the flexible member.
4 more elements
A gas turbine engine comprising:
- an exhaust nozzle, the exhaust nozzle having a downstream end;
- at least one tab extending in a downstream direction from the downstream end of the exhaust nozzle, the tab having a composite article, with a composite member, a flexible member, and at least one shape memory material member,
- the at least one shape memory material member extending substantially parallel to the composite member and the flexible member being positioned between the composite member and the at least one shape memory material member to bond the at least one shape memory material member to the composite member and to maintain a separation between the composite member and the at least one shape memory material member,
- the at least one shape memory material member having an actuator to move the tab between a second non-deployed position and first deployed position,
- the at least one shape memory material member comprising a plurality of shape memory material tapes, wherein the shape memory material tapes are embedded in the flexible member and a portion of each tape projects outwardly from the flexible member to form cooling fins.
2 more elements
A composite article comprising:
- a composite member;
- a flexible member;
- and
- at least one shape memory material member,
- the at least one shape memory material member extending substantially parallel to the composite member and the flexible member being positioned between the composite member and the at least one shape memory material member to bond the at least one shape memory material member to the composite member and to maintain a separation between the composite member and the at least one shape memory material member,
- the at least one shape memory material member including an actuator to move the composite article between a non-deployed position and a deployed position, the composite member opposing actuation of the at least one shape memory material member.
3 more elements
Dependencies are inferred from the claim text.