ACTIVATION METHOD FOR MULTISTAGE AXIAL FLOW COMPRESSOR, AIR COMPRESSION FACILITY, AND GAS TURBINE FACILITY

To suppress generation of an air separation phenomenon in an activation process.SOLUTION: A method for activating a multistage axial flow compressor executes an activation initial step when a rotation speed of a rotor is lower than a first rotation speed N1 that is smaller than a rated rotation speed Nr, and an activation latter step when the rotation speed of the rotor is larger than a second rotation speed N2 that is lower than the rated rotation speed Nr and is higher than the first rotation speed N1. In the activation initial step, an angle of a first stator blade is set to a first stator blade initial angle C1x, and an angle of the second stator blade is set to a second stator blade initial angle C2x. In the activation latter step, the angle of the first stator blade is set to a first stator blade latter angle C1z, and the angle of the second stator blade is set to a second stator blade latter angle C2z. A value ΔC2 obtained by subtracting the second stator blade latter angle C2z from the second stator blade initial angle C2x is larger than a value ΔC1 obtained by subtracting the first stator blade latter angle C1z from the first stator blade initial angle C1x.SELECTED DRAWING: Figure 3 【課題】起動過程における空気剥離現象の発生を抑える。【解決手段】多段軸流圧縮機の起動方法では、ロータの回転数が定格回転数Ｎｒよりも小さい第一回転数Ｎ１より小さい回転数のときに起動初期工程と、ロータの回転数が定格回転数Ｎｒよりも小さく且つ第一回転数Ｎ１より大きい第二回転数Ｎ２より大きい回転数のときに起動後期工程と、を実行する。起動初期工程では、第一静翼の角度を第一静翼初期角度Ｃ１ｘにし、第二静翼の角度を第二静翼初期角度Ｃ２ｘにする。起動後期工程では、第一静翼の角度を第一静翼後期角度Ｃ１ｚにし、第二静翼の角度を第二静翼後期角度Ｃ２ｚにする。第二静翼初期角度Ｃ２ｘから第二静翼後期角度Ｃ２ｚを引いた値ΔＣ２は、第一静翼初期角度Ｃ１ｘから第一静翼後期角度Ｃ１ｚを引いた値ΔＣ１より大きい。【選択図】図３