Gas turbine compressor cooled sync ring bumper

1 . A case mounted bumper pad comprising:

a case contact region supporting a runner pad support;

the case contact region is in operative communication with the case, the runner pad support is in operative communication with a runner pad, the runner pad is in operative communication with a sync ring of a variable vane; and

a gap formed in the bumper pad proximate the case; wherein the gap is configured to prevent the runner pad from being heated to a predetermined temperature, the predetermined temperature comprises a thermal oxidation temperature of the runner pad; wherein the gap comprises dimensions tailored for a predetermined quantity of cooling air flow rate to cool the bumper pad; wherein the dimensions comprise at least one of a gap height, a gap width, and a gap depth configured for a predetermined quantity of cooling air flow through the gap.

2 . The case mounted bumper pad according to claim 1 , wherein the gap is configured to accommodate cooling air in the gap and provide for the removal of thermal energy from the bumper pad.

3 . The case mounted bumper pad according to claim 1 , wherein the bumper pad is configured to reduce the heat transfer from the case to the runner pad.

4 . A gas turbine compressor section case mounted bumper pad comprising:

a compressor variable vane in operative communication with a sync ring; the sync ring mounted on the bumper pad; the bumper pad mounted on the case;

a runner pad between the sync ring and the bumper pad;

the bumper pad comprising a case contact region supporting a runner pad support;

the case contact region is in operative communication with the case, the runner pad support is in operative communication with the runner pad, the runner pad is in operative communication with the sync ring of the variable vane; and

a gap formed in the bumper pad proximate the case; wherein the gap is configured to prevent the runner pad from being heated to a thermal oxidation temperature of the runner pad.

5 . The gas turbine compressor section case mounted bumper pad according to claim 4 , wherein the gap is configured to flow cooling air to pass through the gap and provide for the removal of thermal energy from the bumper pad.

6 . The gas turbine compressor section case mounted bumper pad according to claim 4 , wherein the gap comprises dimensions tailored to allow for a predetermined quantity of cooling air flow rate for cooling to the bumper pad.

7 . The gas turbine compressor section case mounted bumper pad according to claim 4 , further comprising:

a surface feature formed in the bumper pad, wherein the surface feature is configured to increase surface area of the bumper pad exposed to a cooling air flow.

8 . The gas turbine compressor section case mounted bumper pad according to claim 4 , wherein the bumper pad comprises a thickness dimension configured to provide structural support to the runner pad and the sync ring; and the bumper pad comprises material properties configured with a predetermined heat transfer rate to the runner pad.

9 . A process of forming a gas turbine compressor section case mounted bumper pad comprising:

placing a compressor variable vane in operative communication with a sync ring;

mounting the sync ring on the bumper pad;

mounting the bumper pad on the case;

coupling a runner pad between the sync ring and the bumper pad;

the bumper pad comprising a case contact region supporting a runner pad support;

coupling the case contact region in operative communication with the case;

coupling the runner pad support in operative communication with the runner pad;

coupling the runner pad in operative communication with the sync ring of the variable vane; and

forming a gap in the bumper pad proximate the case;

forming the bumper pad with dimensions comprising at least one of a gap height, a gap width, and a gap depth configured for a predetermined quantity of cooling air flow through the gap.

10 . The process of claim 9 , further comprising:

configuring the gap to flow cooling air passing through the gap; and

providing for the removal of thermal energy from the bumper pad.

11 . The process of claim 9 , further comprising:

configuring the gap to prevent the runner pad from being heated to a predetermined temperature.

12 . The process of claim 9 , further comprising:

tailoring the gap with dimensions allowing for a predetermined quantity of cooling air flow for cooling to the bumper pad.

13 . The process of claim 9 , further comprising:

forming the bumper pad with a thickness dimension configured to provide structural support to the runner pad and the sync ring; and

configuring the bumper pad with a material property having a predetermined heat transfer rate to the runner pad.

14 . The process of claim 9 , further comprising:

forming a surface feature in the bumper pad;

configuring the surface feature to increase surface area of the bumper pad exposed to a cooling air flow.