CERAMIC TURBINE ROTOR DISC AND BLADE CONFIGURATION

摘要

A ceramic gas turbine rotor disc is formed integrally with an array of ceramic airfoil blades. Each blade has an elongated shank portion to reduce thermal and mechanical stresses on the rotor disc. An elongated cavity is disposed between adjacent shank members. Each elongated cavity is filled with undensified unattached silicon nitride plug. The plug acts as a centrifugal force pin, preventing excessive blade vibration. Each plug also helps reduce hot motive fluid leakage between adjacent blade shanks.