Patent ID: 7549835

Claim:
A leakage flow control system comprising: a stationary turbine engine component; a seal operatively attached to the stationary turbine engine component; and a turbine engine component rotatable about an axis of rotation, the rotatable turbine engine component having an outer peripheral surface that includes a first region at a first radius relative to the axis of rotation that transitions into a second region at a second radius relative to the axis of rotation, the second radius being greater than the first radius, the turbine engine component further including a transition region between the first and second regions, wherein the transition region is a flare, wherein at least one of the rotating turbine engine component and the stationary turbine engine component is selectively axially movable between a first position and a second position, wherein, in the first position, the seal is disposed over the first region so that a first clearance is defined therebetween, wherein, in the second position, the seal is disposed over the second region so that a second clearance is defined therebetween, the second clearance being less than the first clearance.