In the aerofoil fluctuation control unit for the compressor which controls the fluctuation operation of all variable guide vanes

摘要

PPROBLEM TO BE SOLVED: To prevent unstable operation causing a stall phenomenon of a jet engine, when high-subsonic speed jet plane rises near 20,000 m in flight altitude. PSOLUTION: A vane oscillation control device comprises: a memory means 15 for storing reference data on a reference curve BC of a target oscillation angle and a correction revolution number of a compressor rotors 4a, 4b, and for storing deformed data on deformed characteristic curves DC1, DC2, DC3 wherein only a portion not less than the corrected revolution number of compressor rotors 4a, 4b corresponding to 1.2 of the relative Mach on air inlet chip side is deformed in a closed direction with respect to the reference curve BC, when the flight altitude exceeds a predetermined flight altitude of 10,000 m or more; and a target oscillation angle acquiring means 16 for acquiring a target oscillation angle of all of variable stator vanes 7a, 7b from the corrected revolution number of the compressor rotors 4a, 4b based on the reference curves 4a, 4b, and for acquiring a target oscillation angle of all of the variable guide vanes 11 from the corrected revolution number of the compressor rotors 4a, 4b and the flight altitude based on the reference curve BC and the deformed characteristic curves DC1, DC2, DC3. PCOPYRIGHT: (C)2006,JPO&NCIPI