Patent ID: 6494044
Filing Date: 2002-12-17
Classification: F01D,F02C,F05D,F23M,F23R

Abstract:
A transition piece assembly for a gas turbine comprising:a transition duct having one end adapted for connection to a gas turbine combustor and an opposite end adapted for connection to a first turbine stage, and a pair of side panels; an impingement sleeve surrounding said transition duct and establishing a cooling path therebetween, said impingement sleeve formed with a plurality of rows of cooling holes therein; and a plurality of flow catcher devices, each flow catcher device comprising a scoop fixed to an outside surface of the impingement sleeve about a portion of a respective one of said cooling holes and having an open side defined by an edge of the scoop lying in a plane substantially normal to said outside surface and arranged to face a direction of cooling air flow, such that said flow catcher devices redirect said cooling air flow through said impingement sleeve and onto said transition duct.