| 摘要 |
An airfoil includes an airfoil working portion and an adjoining endwall. The endwall has a leading edge, a trailing edge, a first mateface, and a second mateface that collectively define a perimeter of the endwall, with the first and second matefaces arranged opposite one another. A forward zone is defined by the endwall that extends to the leading edge. The first and second matefaces are each oriented at an angle alphaII relative to radial in the forward zone. An aft zone is defined by the endwall that extends to the trailing edge. The first and second matefaces are each oriented at an angle alphaII relative to radial in the aft zone. The angles alphaII and alphaII are not equal. A middle zone is defined in between the forward and aft zones, and the first and second matefaces transition between the angles alphaII and alphaI in the middle zone.
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