Control for bleed modulation during engine deceleration

Details Control for bleed modulation during engine deceleration Control for bleed modulation during engine deceleration

F - Mech Eng,Light,Heat,Weapons

02

C

341/97, 341/38.1

F02C 9/28 (2006.01) F02C 9/18 (2006.01)

Patent

CA 1288840

Abstract Control for Bleed Modulation During Engine Deceleration In a twin spool gas turbine engine the electronic engine control modulates the open area of the compressor bleed valves during engine transients as a function of a ratio of the actual rate of change of the compressor speed to a maximum scheduled rate of change such that the bleeds are opened more as the actual rate of change approaches the scheduled maximum rate. This continuous modulation provides smooth thrust transition from one steady state condition to another while maintaining a proper safety margin relative to the engine surge line.

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