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US 8,997,496 B2Granted
Hybrid exhaust component
AssigneeUnited Technologies Corporation
InventorsGerard D. Pelletier, Charles P. Logan, Bryan William McEnerney, Jeffrey D. Haynes
Life of this patent
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Abstract
An exhaust includes a wall that has a first composite material having a first coefficient of thermal expansion and a second composite material having a second coefficient of the thermal expansion that is less than the first coefficient of thermal expansion.
Claims18
An exhaust comprising:
- a wall of a rocket engine nozzle extending from a first end to a second end and around a central axis to define an internal space, the wall including a first composite material having a first coefficient of thermal expansion and a second composite material having a second coefficient of thermal expansion that is less than the first coefficient of thermal expansion, the first composite material and the second composite material being formed of respective layered structures, with layers of the layered structure of the first composite material being interleaved in a radially alternating arrangement with layers of the second composite material.
A rocket system comprising:
- a rocket engine including a nozzle having a coefficient of thermal expansion (CTEnozzle);
- and
- a nozzle extension including a wall extending between a first end and a second end and around a central axis, the first end including a first composite material having a first coefficient of thermal expansion (CTE1) and the second end including a second composite material having a second coefficient of thermal expansion (CTE2) that is less than the first coefficient of thermal expansion such that CTEnozzle>CTE1>CTE2, the nozzle extension being secured at the first end to the nozzle, and the first composite material axially abutting the second composite material at an axially intermediate section of the wall, wherein the first composite material is a first fiber-reinforced polymer matrix composite and the second composite material is a second fiber-reinforced polymer matrix composite.
Dependencies are inferred from the claim text.