Hybrid RANS/LES Simulation Strategy for High-Lift Applications with Disturbed Inflow

Abstract

The prediction of gust loads during take off and landing is relevant for the safety of an airplane and should be already considered during the design process. Therefore, we present a framework to investigate the effects of atmospheric gusts on high-lift airfoils with the help of hybrid RANS/LES models (HRLM). To estimate the relevance of different turbulent length scales in the gust, the method relies on the ADDES, which uses algebraic sensors to distinguish RANS and LES regions. The model is used in combination with a vorticity-based LES filter scale and a numerical scheme with low dissipation. High-quality experimental data, which include PIV measurements, are used to validate the simulation results. We will focus on the effects that prevent the flow separation at the flap in the HRLM.