Stress-blended eddy simulation of the aerodynamic and aeroacoustic characteristics over 30P30N high-lift configuration

Shear layer interactions with the slat-trailing edge are identified as the dominant noise-generation mechanism within the present two-dimensional configuration, with additional contributions from trailing-edge shedding and wake-boundary-layer interactions. Surface pressure spectra exhibit both broadband components and narrow-band peaks. The SBES-GEKO approach demonstrates satisfactory agreement with existing experimental data across near-field and far-field aerodynamic and aeroacoustic metrics, indicating its feasibility and capability to capture the relevant flow physics and associated noise generation mechanisms.

Compared with conventional DES/DDES approaches, the SBES-GEKO provides improved robustness of hybrid RANS-LES behaviour under grid refinement, mitigating grid-induced separation while maintaining controlled numerical dissipation. The method’s computational efficiency and fidelity make it a promising tool for future aerodynamic and aeroacoustic studies of complex high-lift configurations and, with appropriate validation, for extension to full-scale aircraft applications.</p>