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

摘要

Provided is a structure of a gas turbine engine for extracting a part of compressed air generated by a compressor. The structure comprises a cylindrical housing 13 extending around an axis C and forming therein at least a part of a compressing chamber in which air is flowed in a direction parallel to the axis as it is compressed to generate the compressed air, the housing having an annular portion 43A, 43B extending around the compressing chamber to define an annular chamber 54, an annular partition 51 dividing the annular chamber into an annular first plenum chamber 55 and an annular second plenum chamber 57 positioned on an upstream side of the first plenum chamber with respect to the direction and separated from the annular first plenum chamber. The cylindrical housing has first apertures 61 defined therethrough to communicate between the compressing chamber and said first plenum chamber. The partition has second apertures 53 defined therethrough to communicate between the first and second plenum chambers. The first and second apertures are configured so that that the first apertures have a first total cross-sectional area and the second apertures have a second total cross-sectional area which is smaller than the first total cross-sectional area.