Modelling the sources of cracking of aircraft compressor vanes rings

The largest thermal transients occur during start-up and shutdown, along with the full power condition, which may happen during flight. Each of these cases was analysed as part of a full thermal parameter study. In each case, the location, magnitude and direction of the maximum stresses was recorded and comparisons made with the damage observed in the real structure. As a result, some recommendations have been made on the design and approach to repair of the vane ring for improved service life performance.