SYSTEM AND METHOD OF CONTROLLING AIR FLOW IN GAS TURBINE

摘要

PROBLEM TO BE SOLVED: To provide a system capable of controlling the air flow supplied to a turbine shroud in which a plurality of control logic systems are applied. SOLUTION: The system to control the air flow given to a gas turbine shroud in an airplane engine is configured so that the air flow is adjusted by an adjuster valve 60 in a position controlled with a first control signal Sc10, wherein the first control signal Sc10is calculated on the basis of the first set value Vc10corresponding to the specified clearance between a rotor and the turbine shroud. The system is further furnished with selecting means 20 and 30 to calculate at least one of the second control signals Sc20and Sc30on the basis of the second set values Vc20and Vc30different from the first value Vc10to indicate the clearance in the turbine and also a selecting means 50 to select the second control signal in order to control the adjuster valve in accordance with one or more engine parameters. COPYRIGHT: (C)2006,JPO&NCIPI