| 摘要 |
A method for improving the cooling effectiveness of a gaseous coolant stream which flows through at least one passage hole (48) in a substrate (20) to an exit site on a high-temperature surface (42) of the substrate is disclosed. The method comprises disrupting the coolant stream at the exit site, so that the coolant stream contacts a greater area of the high-temperature surface. In some embodiments, the exit site is a crater (51). Moreover, the exit site may be formed within a coating applied over the substrate, e.g., a thermal barrier coating applied over a superalloy substrate. Related articles are also disclosed. <IMAGE> |
