LOW PRESSURE TURBINE PROVIDED WITH SPLITTERS AT THE LAST STATOR ARRAY, IN PARTICULAR FOR A GAS TURBINE ENGINE

摘要

A low pressure turbine, in particular for a gas turbine engine, extends along an axis, has an annular conduit for guiding a gas flow and is provided with a plurality of stator arrays of blades and a plurality of rotor arrays of blades; the last of the stator arrays, considering the advancement direction of the gas flow, has a plurality of blades, which define a plurality of spaces between them in circumferential direction; the spaces are split by respective splitters into a radially outer conduit and into a radially inner conduit; the radial position of the splitters is in the neighborhood of a radial reference position such that at least one acoustic mode is of the cut-on type in the radially inner conduit.

主权项

1. Low pressure turbine, in particular for a gas turbine engine, the turbine extending along an axis (3), having an annular conduit (6) for guiding a gas flow and comprising a plurality of stator arrays of blades and a plurality of rotor arrays of blades; the last of said stator arrays, along the advancement direction of the gas flow, comprising a plurality of blades (25), which define a plurality of spaces (26) between them in circumferential direction; said spaces (26) being split by respective splitters (32) in a radially outer conduit (26a) and in a radially inner conduit (26b);characterized in that the radial position of each said splitter (32) is in the neighborhood of a radial reference position which corresponds to a condition in which at least one acoustic mode is of the cut-on type in said radially inner conduit (26b), for a given circumferential order of said acoustic modes.