| 摘要 |
A staging fixture for holding a single vane nozzle assembly in a predetermined position enables characterization of the effective throat area of the nozzle assembly. The fixture has a holding element for supporting the assembly in a central position, mechanical structure for locating the assembly in the holding element, a first reference surface structure having a first reference surface in opposed juxtaposition to the central position, and a second reference surface structure having a second reference surface in opposed juxtaposition to the central position and on a side opposite to that of the first reference surface. Open area measurements made with a standard reference vane element provide alignment or calibration measurements whereby leading and trailing "half areas" of a single vane airfoil assembly can be determined. An automated selection and vane retrieval method and apparatus provide for the automatic retrieval of the vanes from known storage locations and the assembly of the nozzle to provide specified total area and uniform air flow across the entire nozzle and circumference.
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