COMPOSITE CERAMIC CORE Russian patent published in 1997 - IPC

FIELD: foundry, in particular, casting of cooled blades for gas turbine engine from fireproof alloys. SUBSTANCE: composite ceramic core has main core and additional cores, which are positioned on fin of base core and have longitudinal rows of staggered slots and ridges disposed on inner and outer sides of additional cores. Ridges on inner side of additional cores are rigidly connected with main core surface. Ridges may be formed as pins or hollow spheres. Different versions of construction allow solid thin-walled blades with permeable cooling system to be produced. Cooling capacity of such blade is about 0.6 and gas temperature in turbine is increased to 1800 C. Service life of new-generation engines is increased by 3-5 times. EFFECT: increased efficiency by enhanced cooling capacity and increased service life. 3 cl, 3 dwg