Gas turbine engine and a rotor for a gas turbine engine
AssigneeROLLS-ROYCE plc
InventorAlan R. Jones
Life of this patent
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Abstract
A rotor (38) for a gas turbine engine (10) has a low emissivity surface finish, or high emissivity surface finish (44), on at least a portion of its surface (42) to reduce temperature differentials between an upper portion and a lower portion of the rotor (38). This reduces bowing of the rotor (38) to allow the gas turbine engine (10) to be started without harmful vibrations of the rotor (38).
Claims37
A gas turbine engine comprising at least one rotor and at least one casing arranged coaxially around the at least one rotor, the rotor having an upper portion, a lower portion and a surface, the at least one casing having a surface, at least one of the at least one rotor or the at least one casing having a surface finish on at least a portion of its surface to reduce temperature differentials between the upper portion and the lower portion of the at least one rotor, the surface finish being selected from the group comprising a low emissivity surface finish and a high emissivity surface finish.
A rotor for a gas turbine engine having an upper portion, a lower portion and a surface, the surface having a surface finish on at least a portion of its surface to reduce temperature differentials between the upper portion and the lower portion of the rotor, the surface finish being selected from the group comprising a low emissivity surface finish and a high emissivity surface finish.
A rotor for a gas turbine engine as claimed in claims 23 to 37 wherein the high emissivity surface finish is selected from the group comprising a coating applied to the surface of the rotor and a coating formed on the surface of the rotor.
Dependencies are inferred from the claim text.