Patent ID: 7568882
Filing Date: 2009-08-04
Classification: F01D,F05B,F05D,Y02T

Abstract:
1. A turbine blade comprising: a root portion for fixing said blade to a turbine rotor; an airfoil portion extending longitudinally from said root; at least one airfoil cooling passage extending through said airfoil, said airfoil cooling passage having an inlet for receiving a flow of cooling fluid; a shroud projecting outwardly from said airfoil and having a radially inward facing surface and a radially outward facing surface; a wall defining at least one exit hole for exiting cooling fluid from said airfoil cooling passage; at least one shroud cooling chamber in flow communication with at least one said exit hole, said exit hole being directed towards a target wall surface of said cooling chamber, whereby said exit hole defines an impingement hole for impingement cooling said target wall surface as an impingement zone; and at least one outlet aperture for flowing spent impingement cooling fluid out of said cooling chamber.