| 摘要 |
<p>A turbine nozzle includes: a hollow, airfoil-shaped turbine vane (14); and an arcuate first band (16, 18) disposed at a first end of the turbine vane (14), the first band (16, 18) having a tlowpath face adjacent the turbine vane (14), arid an opposed back face (56). The back face (56) includes at least one open pocket (58), the at least one pocket (58) defined in part by a bottom wall (66) recessed front the back face (56), opposed ends of the bottom wall (66) merging with the back face (56). The bottom wall (66)is substantially free of interior corners, in order to avoid recirculation and thermal stress due to the secondary air flow "X", coming in the presence of high velocity flow, which creates the streamline "S".</p> |
