Heat shield for gas turbine stator, has arrangement on shield to prevent hot air turbulence form forming in hollow volume upstream of first arrangement for preventing hot air flow.

摘要

The heat shield (25) encloses the turbine rotor at a radial distance to form a hollow volume and the turbine blades (10) have a cover band (11) with an arrangement (12,13) for preventing the flow of hot combustion air (33) past the radially outer side of the cover band. A second arrangement (34) mounted on the heat shield prevents hot air turbulence form forming in the hollow volume upstream of the first arrangement. Independent claims are also included for the following: a gas turbine and a method of cooling ribs on a cover band on a turbine rotor.