Gas turbine engine air baffle for a rotating cavity

An annular air baffle comprising:

• an annular split ring,
• a plurality of circumferentially spaced apart fins attached to the ring,
• the ring and the fins being integrally formed in one piece,
• the fins having common surfaces with the ring, and
• the common surfaces being circular cross-sectional surfaces of the ring and radially outer rounded corners of the fins.

An annular air baffle comprising:

• an annular split ring,
• a plurality of circumferentially spaced apart fins attached to the ring,
• the fins having common surfaces with the ring, and
• the common surfaces being circular cross-sectional surfaces of the ring and radially outer rounded corners of the fins.

A rotatable annular gas turbine engine part comprising:

• a cavity closed at a radially outer diameter and open at a radially inner diameter of a first hub,
• an annular air baffle disposed within the cavity,
• the air baffle including an annular split ring, and
• a plurality of circumferentially spaced apart fins attached to the ring.

A high pressure turbine assembly comprising:

• high pressure turbine first and second stage disk assemblies circumscribed about a centerline.
• the first and second stage disk assemblies including first and second disks having first and second rims supporting first and second turbine blades, respectively,
• first and second webs extending radially inwardly from the first and second rims, to first and second hubs, respectively,
• a conical connection to a cylindrical shaft extending axially forwardly from the first hub of the disk,
• an annular cavity between the conical connection to the cylindrical shaft and the first hub,
• the cavity closed at a radially outer diameter and open at a radially inner diameter of the first hub,
• an annular air baffle disposed within the cavity,
• the air baffle including an annular split ring, and
• a plurality of circumferentially spaced apart fins attached to the ring.

An annular air baffle comprising:

• an annular split ring,
• a plurality of circumferentially spaced apart fins attached to the ring,
• the ring and the fins being integrally formed in one piece,
• the fins having common surfaces with the ring, and
• the common surfaces being circular cross-sectional surfaces of the ring and radially outer rounded corners of the fins.