Axial flow compressor, gas turbine system having the axial flow compressor and method of modifying the axial flow compressor

摘要

There is provided an axial flow compressor that improves reliability on an increase in a blade loading on a last-stage stator vane of the axial flow compressor due to a partial load operation of a gas turbine. An annular flow passage is formed by a rotor having multiple rotor blades fitted thereto and a casing having multiple stator vanes fitted thereto, two or more of the stator vanes are disposed downstream of a last-stage rotor blade that is the rotor blade disposed at the most downstream side in a flow direction of the annular flow passage, a blade loading on a first stator vane disposed at the most upstream side is set to be smaller than a blade loading of a second stator vane disposed downstream of the first stator vane by one row.

主权项

1. An axial flow compressor comprising:
an annular flow passage that is formed by a rotor having a plurality of rotor blades fitted thereto; and a casing having a plurality of stator vanes fitted thereto, wherein
two or more of the stator vanes are disposed downstream of a last-stage rotor blade of the annular flow passage, the two or more stator vanes being fixed stator vanes without angle variable mechanisms, anda blade loading on a first stator vane disposed at the most upstream side among the two or more stator vanes is set to be smaller than a blade loading of a second stator vane disposed downstream of the first stator vane by one row.