NUMERICAL SIMULATIONS OF THE WAKE VORTEX NEAR FIELD OF HIGH-LIFT CONFIGURATIONS

Abstract. Euler simulations of the nearfield wake of the DLR-F11 model in take-off configuration and a very large transport model in landing configuration are performed using the DLR TAU code on unstructured grids. The aim of the investigation is firstly to analyse the predictive capability of an Euler code for high-lift configuration vortex wakes and secondly to study configuration effects on the vortex wake nearfield. A grid adaptation strategy and parameter settings for the flow simulation are determined by validation with 5-hole probe measurement results that lead to good agreement between simulation and experiment at a half wing span downstream of the model wing tip. The identical simulation procedure is applied to a very large transport aircraft configuration and the interaction between the outer engine jet and the flap side-edge vortex is investigated. 1 E. Stumpf, J. Wild, A.A. Dafa’Alla and E.A. Mees