Patent ID: 9644903
Date: 2017-05-09
CPC Classifications: F01D,F05D,F15D,F28F

Claim:
1. An apparatus comprising: a turbine airfoil surface; an aperture extending through the turbine airfoil surface; a coolant that exits the aperture and interacts with a free stream flow to form a pair of counter-rotating vortices such that the pair of counter-rotating vortices are urged to lift-off from the turbine airfoil surface and results in reduced cooling effectiveness; and a v-shaped recess located in the turbine airfoil surface, the v-shaped recess comprising: wherein the v-shaped recess reduces the strength of the counter-rotating vortices, mitigates lift-off, and urges the coolant to stay in contact with the turbine airfoil surface to enhance cooling effectiveness.