Patent ID: 6401460
Filing Date: 2002-06-11
Classification: F01D

Abstract:
A method of actively controlling a clearance between a first component and a second component of a combustion gas turbine engine during operation of the engine, the method comprising the steps of:taking a first measurement of the clearance with a sensor mechanism; comparing the first measurement with a desired setting; generating a correction signal with a controller; supplying a first air flow to the first component, said first component having a first radial location; controlling the temperature of the first air flow responsive to the correction signal; supplying a second air flow to the second component, said second component having a second radial location, said clearance being located radially between said first and second components; and controlling the temperature of the second air flow responsive to the correction signal; whereby, said clearance is maintained by cooperative control of thermal growth of said first and second components.