Reduced height ligaments to minimize non-integral vibrations in rotor blades

摘要

A system for minimizing non-integral vibrations in rotor blades located in a compressor section of a gas turbine engine includes a casing having a plurality of bleed slots, at least one of the bleed slots being located in close proximity to a row of rotor blades, a plurality of structural ligaments, at least one of the structural ligaments extending between two adjacent ones of the bleed slots; and a channel for reducing the height of at least one of the structural ligaments so as to minimize the non-integral vibrations in the rotor blades in the row.

主权项

1. A system for minimizing non-integral vibrations in rotor blades, comprising:
a casing having a plurality of bleed slots; at least one of said bleed slots being located in close proximity to a row of rotor blades; a plurality of structural ligaments; at least one of said structural ligaments extending between two adjacent ones of said bleed slots; a plurality of valves for sealing said bleed slots and for preventing a flow of air through said bleed slots; and a channel in said at least one structural ligament, wherein said rotor blades rotate about an axis and two opposed ends of said structural ligament are inclined at a non-perpendicular angle with respect to said axis.