Patent ID: 6659712
Filing Date: 2003-12-09
Classification: F01D,F05D,G01M,Y02T

Abstract:
A rotary machine comprising a plurality of aerofoils arranged in a set, an apparatus for detecting damage to at least one of the aerofoils in the set, the apparatus for detecting damage to at least one of the aerofoils in the set comprising at least one pressure transducer arranged to detect the pressure in the fluid flow around the aerofoils in the set and to produce a pressure signal corresponding to said pressure, a processor unit arranged to analyse the pressure signal to determine if the difference in pressure between the fluid flow around at least one of the aerofoils in the set and the fluid flow around the remainder of the aerofoils in the set is above a predetermined level, the processor unit is arranged to produce a signal indicative of damage to at least one of the aerofoils in the set if the difference in pressure is above the predetermined level and to send the signal to an indicator device.