Patent ID: 9238971
Filing Date: 2016-01-19
CPC Classification: F01D

Claim Text:
1. A device for directing gas impingement to an inner casing of a gas turbine, the device comprising: a plate configured for attachment to the outer surface of the inner casing, the plate having a first surface opposing the inner casing when the plate is attached to an area of the inner casing, a second surface opposite the first surface and a flange that extends radially inwardly from the first surface towards the inner casing entirely about a perimeter of the plate, the plate defining a plurality of holes through the plate from the first surface to the second surface, the holes arranged with a predetermined non-uniform distribution in the plate corresponding to a desired preferential impingement pattern for providing non-uniform heat transfer from the area during operation of the gas turbine so as to control temperature of the inner casing across the area, wherein the flange is disposed within a slot defined within the outer surface of the inner casing forming a sealed cavity between the outer surface and the first surface.