Patent ID: 9115595
Filing Date: 2015-08-25
Classification: F01D,F05D

Abstract:
1. A system adapted for clearance control for a gas turbine including an outer turbine casing, an inner turbine casing and a plenum defined between the inner and outer turbine casings, the clearance control system comprising: an impingement box disposed within the plenum, the impingement box defining a plurality of impingement holes, the impingement box being spaced radially outwardly from the inner turbine casing such that a flow duct is defined directly between the impingement box and an axial portion the inner turbine casing defined axially between opposed sidewalls of the impingement box; a first conduit in flow communication with the interior of the impingement box; and a second conduit in flow communication with the plenum at a location exterior to the impingement box, wherein, when fluid is supplied through the second conduit and into the plenum, the fluid flows around the opposed sidewalls of the impingement box and through the flow duct defined along the axial portion of the inner turbine casing.