| 摘要 |
A blade is disclosed having an upper airfoil configuration and a lower platform with a root constructed with conventional fir-tree design. The forward part of the blade is formed of radial wafers wherein desired configurations of cooling passageways can be formed on mating surfaces of the wafers so that bonding of these wafers together forms intricate internal passageways. Film cooling is shown on the pressure side of the blade, while convection cooling and some film cooling is shown on the suction side. The radial wafers of the forward part are open at the center thereof to provide a cavity in a finished blade for a cooling fluid to flow from an opening in the root thereof to the internal passageways. The cavity extends to the top of the blade and is covered by a tip cap. The cap extends over the side wafers of the rearward part. The rearward part of the blade is formed of side wafers with one forming the suction side of the blade, while the other forms the pressure side of the blade. The abutting surfaces of the side wafers are formed having wavy, criss-crossing grooves for receiving cooling fluid from said cavity and directing it out the trailing edge of the blade. Another modification includes a thin plate between the mating surfaces of the side wafers.
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