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A rotor wheel for a gas turbine rotor has a first side having a plurality of curved paddles separated by a plurality of curved slots and a second side having a plurality of radial paddles separated by a plurality of radial slots. A method of purging a rotor of a gas turbine includes providing a flow

A rotor wheel for a gas turbine rotor has a first side having a plurality of curved paddles separated by a plurality of curved slots and a second side having a plurality of radial paddles separated by a plurality of radial slots. A method of purging a rotor of a gas turbine includes providing a flow of compressed air between adjacent rotor wheels of the rotor in a radially downward direction on a first side of each wheel and in a radially upward direction on a second side of each wheel; passing the flow through a curved slots on the first side of each rotor wheel; and passing the flow through radial slots on the second side of each rotor wheel.

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1. A rotor wheel for a gas turbine rotor, comprising: a first side having a plurality of curved paddles separated by a plurality of curved slots, wherein the curved slots are curved along a longitudinal axis of each of the slots; anda second side having a plurality of radial paddles separated by a p

1. A rotor wheel for a gas turbine rotor, comprising: a first side having a plurality of curved paddles separated by a plurality of curved slots, wherein the curved slots are curved along a longitudinal axis of each of the slots; anda second side having a plurality of radial paddles separated by a plurality of radial slots, wherein the radial slots have a linear axis and wherein the first side is configured to be exposed to a flow of compressed air through the rotor in a radially downward direction of the rotor wheel and the second side is configured to be exposed to the flow in a radially upward direction of the rotor wheel. 2. A rotor wheel according to claim 1, wherein the plurality of curved slots each include an entrance configured to swirl the purge flow to convert a tangential velocity head of the purge flow into a static pressure head. 3. A rotor wheel according to claim 2, wherein the plurality of curved slots each include an exit at an angle to a bore region of the rotor wheel configured to swirl the purge flow and increase heat transfer to the bore region of the rotor wheel. 4. A rotor wheel according to claim 1, wherein each of the plurality of curved paddles and each of the plurality of radial paddles comprises a recess. 5. A rotor wheel according to claim 4, wherein each recess is machined. 6. A rotor wheel according to claim 5, wherein each recess is milled. 7. A rotor wheel according to claim 1, wherein each of the plurality of radial slots and each of the plurality of curved slots are machined. 8. A rotor wheel according to claim 7, wherein each of the plurality of radial slots and each of the plurality of curved slots are milled. 9. A rotor for a gas turbine comprising a plurality of rotor wheels according to claim 1. 10. A method of purging a rotor of a gas turbine, comprising: providing a flow of compressed air between adjacent rotor wheels of the rotor in a radially downward direction on a first side of each wheel and in a radially upward direction on a second side of each wheel;passing the flow through a plurality of curved slots on the first side of each rotor wheel, wherein the curved slots are curved along a longitudinal axis of each of the slots; andpassing the flow through a plurality of radial slots on the second side of each rotor wheel, wherein the radial slots each have a linear axis. 11. A method according to claim 10, wherein passing the flow through the plurality of curved slots comprises converting a tangential velocity head of the flow at an entrance of each of the plurality of curved slots into a static pressure head. 12. A method according to claim 11, wherein converting the tangential velocity head of the flow at the entrance of each of the plurality of curved slots into a static pressure head comprises swirling the flow at the entrance to each of the plurality of curved slots. 13. A method according to claim 11, wherein passing the flow the plurality of curved slots comprises directing the flow out of the plurality of curved slots at an angle to a bore of the rotor wheel and in a direction of rotation of the rotor wheel. 14. A method according to claim 10, wherein the plurality of curved slots are provided between a plurality of curved paddles on the first side of each rotor wheel. 15. A method according to claim 14, wherein the plurality of radial slots are provided between a plurality of radial paddles on the second side of each rotor wheel. 16. A method according to claim 15, wherein each of the plurality of curved paddles and each of the plurality of radial paddles comprises a recess.