Wake vortex evolution analysis of trapezoidal wings with varied flap configurations based on the Liutex method

This study investigates the impact of slat and flap configurations on aircraft wake vortex dynamics using the AIAA HiLiftPW-1 trapezoidal wing model. A Liutex-Omega vortex identification framework combined with connected component analysis enables precise extraction of vortex parameters, validated through hybrid RANS-LES simulations. Results demonstrate that slat deployment accelerates wing vortex formation and amplifies flow complexity at wing-body junctions, while flap span length critically governs merging patterns. Increased flap deflection enhances vortex concentration and delays dissipation, with merging chronology significantly influenced by fuselage-induced interactions. Proper Orthogonal Decomposition reveals energy redistribution mechanisms during merging, highlighting slat-induced suppression of streamwise energy decay. Although aerodynamic performance remains stable under configuration changes, vortex merging modes exhibit nonlinear sensitivity to high-lift adjustments. The study preliminarily establishes a predictive link between flap geometry and merging regimes, providing insights for wake management strategies. Future work will address mid-to-far-field vortex evolution under critical configurations.