Turbine engine stator and method of assembly of the same

摘要

A turbine engine stator stage includes a plurality of vanes with each of the plurality of vanes having a camber angle. The plurality of vanes is arranged in a plurality of groups with each group including a pre-determined sequence of vanes. The ordering of vanes within each group is determined by the camber of the individual vanes. This results in an arrangement of vanes within the stator stage which can modify the flow characteristics of the air entering the stator stage to reduce the circumferential pressure variation in the flow region immediately downstream of the stator stage.

主权项

1. A method of assembling a turbine engine stator comprising a plurality of vanes, each of the plurality of vanes having a camber angle, the method comprising the steps of:
(a) selecting a group of vanes based on the camber angle of each of the plurality of vanes; (b) selecting a nominally cambered vane; (c) positioning at least one over-cambered vane on a first side of the nominally cambered vane and at least one under-cambered vane on an opposite, second side of the nominally cambered vane, each of the nominally cambered vane and an endmost of each of the under-cambered and over-cambered vanes in a group of vanes having a respective inspection feature, each inspection feature having a length; (d) repeating steps (a) to (c) to form a plurality of groups of vanes; and (e) positioning the groups of vanes in a pre-determined order such that each group of vanes is positioned at a predefined circumferential position in the assembled stator stage; (f) measuring the length and circumferential position of each of the inspection features; (g) identifying the nominally cambered vane, and the under-cambered and over-cambered vanes at respective opposite ends of the sequence of vanes in each group on the basis of the length of the respective inspection feature; (h) confirming that the circumferential position of each of the nominally cambered vanes and the over-cambered and under-cambered end vanes in each group matches the corresponding predefined circumferential position; and (i) confirming that the sequence of vanes in each group matches the respective pre-determined sequence on the basis of the quantities of over-cambered and under-cambered vanes which are present on respective opposite sides of the nominally cambered vane.