Active control thermal-loading method to ameliorate stress in aeroengine turbine disk

An active control thermal loading method to ameliorate stress in an aeroengine turbine disk has been theoretically and numerically investigated on a rotating uniform thickness disk model under equal consumption of cooling air and heating energy conditions. The hub of the disk is actively heated to achieve energy redistribution and analogous V-shaped temperature distribution of the disk. The relationship between energy distribution and stress level of the disk is first built by theoretical analysis, and then the computational fluid dynamics and finite element simulations are carried out to validate the feasibility and validity of the theoretical analysis. The comparison between computed data and theoretical results is also performed. Results show that the pulling effect from an active produced reverse temperature gradient can counteract the thermal stress caused by a positive temperature gradient, and parts of stress from centrifugal force, enabling the stress level of the disk to be declined. In addition, even a small temperature of the lower part of disk increased can make a great ameliorate in stress level of disk and this effect is enhanced with an increasing ratio of transfer energy ?. In general, the computed data are in agreement with the preceding results.