Ice Shape Prediction For Turbofan Rotating Blades

TLDR: In this paper, a parametric study of ice accretion on a high bypass turbofan engine booster rotor is presented, where both flow and droplets' governing equations are formulated and solved in the reference frame of the rotating blades.

Abstract: This paper presents a parametric study of ice accretion on a high bypass turbofan engine booster rotor. Both flow and droplets' governing equations are formulated and solved in the reference frame of the rotating blades. A Eulerian-Lagrangian approach is used for the continuous and discrete phases with one-way interaction model to simulate momentum and energy exchange on the droplets and their effects on the three-dimensional droplet trajectories. The flux-based collection efficiency is calculated for the rotor blade at 60%, 70%, 80%, 90% and 100% engine design speed. A quasi-3D analysis of the ice accretion over the rotor blade is conducted based on the computed flow characteristics using the code LEWICE. Results are presented for the ice shape variation along the span, inlet temperature and rotor speeds. The highest accumulation was predicted on the blade pressure side leading edge near the hub and increased with reduced rotor speed and flow temperature.