STRUCTURE FOR EXTRACTING COMPRESSED AIR FROM COMPRESSOR OF GAS TURBINE ENGINE, AND GAS TURBINE ENGINE

摘要

Provided is a structure for a gas turbine engine, for extracting a portion of compressed air produced by a compressor. The structure comprises a cylinder-shaped casing (13), ring-shaped parts (43A, 43B), and a partition wall (51). The cylinder-shaped casing (13) extends around an axis (C). In a compression chamber (30), compressed air is produced by compressing air while said air is caused to flow in a direction parallel to the axis, and at least a portion of the compression chamber (30) is formed inside the casing. The ring-shaped parts (43A, 43B) extend around the compression chamber and form a ring-shaped chamber (54). The ring-shaped chamber is divided by the partition wall (51) into a ring-shaped first plenum chamber (55) and a ring-shaped second plenum chamber (57) which is disposed at an upstream side in the direction parallel to the axis and is separated from a first pipe-shaped plenum chamber. The cylinder-shaped casing is provided with a plurality of first apertures (61) which are formed through the cylinder-shaped casing to link the compression chamber and the first plenum chamber. The partition wall is provided with a plurality of second apertures (53) which are formed through the partition wall to link the first plenum chamber and the second plenum chamber. The plurality of first apertures have a first total cross-sectional area, the plurality of second apertures have a second total cross-sectional area, and the second total cross-sectional area is smaller than the first total cross-sectional area.