| 摘要 |
<p>Provided is a cooling structure of a gas turbine rotor blade, wherein cooling air which has convection cooled a fillet part is ejected from branch pipes open on the surface of a platform having small thermal stress without drilling holes in the fillet part, a blade surface, and the surface of the platform that have large thermal stress. A gas turbine rotor blade is formed from a base part which is affixed to a rotor, a platform which is affixed to the base part and provided with a cooling flow path therein, an airfoil part which extends radially outward from the platform, and a fillet part which is disposed on a surface connecting the airfoil part and the platform, and is characterized by being formed from a header pipe which branches from the cooling flow path and is open at the side end of the platform, and branch pipes which branch from the header pipe, are close to the inner side in the radial direction of the fillet part along the fillet part, and are each provided with a film hole open on the surface of the platform.</p> |
