12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics
Turbulence plays an important role on the aero-thermal performance of modern aircraft engine high pressure turbines. The role of the vane wake and passage turbulence on the downstream blade is an important consideration for both performance and durability. In this paper, we consider turbulence and transition modeling for RANS, hybrid RANS/LES and wall resolved LES simulations of a span-wise periodic representation of the uncooled vane of Arts and Rouvroit geometry to establish predictive capability. A fundamental blade has been designed to pair with the uncooled vane to evaluate the impact of passage turbulence and vane wake on the downstream blade boundary layer, wake formation and evolution. Finally, the learnings from the statistical 2D simulations are applied to a full 3D annular representation of the geometry to demonstrate impact of secondary flows on the overall aero-thermal performance of the stage.