| 摘要 |
PURPOSE: To raise film cooling efficiency by forming a rear edge overlapping the surface of a main body in a leading edge portion, and defining a slot between an inner wall surface of the rear edge and the outer surface of a main blade. CONSTITUTION: A cantilever portion 36 is formed, overlapping a blade surface 38 of a main body, in a leading edge portion 14 of a main blade 12. A slot 40 communicating with a cavity 34 is defined between an inner wall surface of the cantilever portion 36 and an outer wall surface of the main blade 12. The cooled air blown out from the slot 40 is almost completely blown out in the tangential direction of a blade surface of the main blade. Thus, the entire surface of the blade is covered by an air layer, and film cooling efficiency can be raised. |
