Patent ID: 11867083
Assignee: SIEMENS ENERGY GLOBAL GMBH & CO. KG
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A turbine blade for a gas turbine, comprising:
a blade root; and
an aerodynamically curved blade leaf extending from the blade root, the blade leaf including:
a leading edge;
a trailing edge;
a pressure-side blade wall and a suction-side blade wall each extending from the leading edge to the trailing edge so as to guide a working medium around the blade leaf; and
a plurality of cooling-air outlet openings configured to emit cooling air routed through an inside of the blade leaf, each cooling-air outlet opening formed on the pressure-side blade wall so as to extend upstream from the trailing edge relative to a direction of flow of the working medium,

wherein at least one cooling-air outlet opening of the plurality of cooling-air outlet openings includes a rectangular or trapezoidal shape with rounded corners,
wherein at least one of the rounded corners on an upstream side and closest to the blade root, forms a relief notch which projects outward from the rectangular or trapezoidal shape and includes a rounded notch base.