Full 3D Rotor/Stator Interaction Simulations in Aircraft Engines With Time-Dependent Angular Speed

Increasingly tight operating clearances between rotating and static components of aircraft engines advantageously increase their overall efficiency but also lead to more frequent structural contacts which cannot be only considered in accidental configurations anymore. Such interactions should be accounted for as early as the design stage of bladed components, thus engine manufacturers are focusing on the development of robust numerical strategies in order to get a better understanding of the physical phenomena at play when such contacts occur. Recent numerical investigations by Batailly et al. (2012) led to promising results with a good agreement between predicted results and experimental observations both on lowand high-pressure compressor blades. In this context, it is here proposed to extend an existing in-house numerical strategy, previously introduced by Legrand et al. (2012), accounting for a time-dependent angular speed. As a first approach, angular acceleration stiffening terms are neglected.