| 摘要 |
A showerhead cooling arrangement for a turbine airfoil in which the showerhead includes a row of film cooling holes on the stagnation point of the leading edge, a row of pressure side film cooling holes, and a row of suction side film cooling holes to form the showerhead. A pattern of grooves is formed on the leading edge surface in both a criss cross shape and three longitudinal shapes and in which the showerhead film cooling holes are located in the grooves. A TBC is applied over the leading edge surface and into the grooves. The grooves retain the TBC and prevent spallation, and the grooves hold the film layer together longer so that the cooling effectiveness is increased.
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