| 主权项 |
1. A turbine blade for a turbomachine, comprising:
an outer wall which delimits an inner cavity of the turbine blade, wherein cooling fluid is provided in the inner cavity for film-cooling of the turbine blade, at least one through duct arranged in the outer wall, wherein the cooling fluid flows through the at least one through duct from the inner cavity to an outside of the turbine blade so as to form a cooling film on an outer face of the outer wall, wherein the at least one through duct is inclined with respect to a trailing edge of the turbine blade, wherein a marginal portion of an entrance of the at least one through duct is designed to be sharp-edged on an upstream side in relation to other marginal portions of the entrance such that a separation zone of a cooling fluid flow is formed in the at least one through duct, wherein the separation zone induces a centric transverse flow of the cooling fluid which is directed toward a side of the at least one through duct which lies opposite the separation zone, wherein a pair of contra-directional vortices develops in the at least one trough duct such that velocity vectors of the cooling fluid flow between vortex centers point toward the downstream side of the at least one through duct. |
