COOLED TURBINE OF GAS TURBINE ENGINE Russian patent published in 2003 - IPC

FIELD: mechanical engineering; gas turbine engines. SUBSTANCE: proposed cooled turbine of gas turbine engine has working wheel with channels made in disk to supply cooling air to working blades, and swirling nozzle assembly whose outlet channels are pointed to side of working wheel rotation. Ring space is formed between outlet of swirling nozzle assembly and disk. Cooled turbine is provided also with additional disk connected with disk of working wheel and forming bladeless diffuser with disk. inlet of bladeless diffuser communicates with ring space, and outlet, with channels to supply cooling air to working blades. Outlet channels of swirling nozzle assembly are made in form of de Laval nozzles and are turned additionally in radial direction so that middle line of each channel forms angle of 15-90^° with longitudinal axis of engine. Ring space communicates directly with gas air duct of turbine in zone before working wheel. EFFECT: improved efficiency of turbine wheel members cooling by reducing air flow temperature and increasing its velocity in cooling duct. 2 cl, 3 dwg