Gas turbine vane cooling system

摘要

The turbine has a centrally disposed rotor, and a combustion section enclosed by a shell, the shell forming a chamber in flow communication with the compressor. The combustion section includes combustors for producing a hot gas disposed in the chamber and in flow communication with it. There is a turbine section in flow communication with the combustors and forming a flow path for the hot gas. The turbine section include a number of vanes, each of the vanes being hollow so as to form a cooling air passage, the cooling air passages being in direct flow communication with the chambers. There are members for cooling the vanes, the vane cooling members including device for recirculating a portion of the compressed air from the chamber through the vanes and back to the chamber and mixing the recirculated portion with the compressed air.