2026-10-10T06:29:13Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33954564 2026-09-21T13:47:05Z category_1 category_915 category_7 category_12 category_873 category_734 category_931 category_61 portal_87 item_type_3 month_year_09_2026

Stress-blended eddy simulation of the aerodynamic and aeroacoustic characteristics over 30P30N high-lift configuration Yujing Lin (12417765) Jian Wang (5901) Biophysics Physical Sciences not elsewhere classified Medicine Cell Biology Chemical Sciences not elsewhere classified Biological Sciences not elsewhere classified Information Systems not elsewhere classified Developmental Biology Stress-Blended Eddy Simulation generalised k−ω model high-lift configuration aeroacoustic characteristics <p>High-lift devices with deployed leading-edge slats and trailing-edge flaps are major contributors to airframe noise during aircraft approach and landing. This study presents a high-fidelity numerical investigation of the aerodynamic and aeroacoustic characteristics of a generic, unswept, 30P30N high-lift configuration under approach conditions (Mach number Ma=0.17, Reynolds number Rec=1.71×106 and angle of attack α=5.5∘). An advanced turbulence scale-resolving technique -- Stress-Blended Eddy Simulation (SBES), integrated with the Generalised k−ω (GEKO) model in the attached boundary-layer region is employed for the first time in this context. Aeroacoustic predictions are obtained using an impermeable-surface Ffowcs Williams-Hawkings (FW-H) formulation. The simulation reveals complex unsteady flow phenomena in the slat cove, including the formation of quasi-two-dimensional turbulent structures at the slat cusp, their transition to three-dimensional behaviour along the shear layer, impingement of the vortex shear layer on the slat’s lower surface and the development of a low-speed recirculation bubble in the cove. 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> 2026-09-21T13:47:05Z Dataset Dataset 10.6084/m9.figshare.33954564.v1 https://figshare.com/articles/dataset/Stress-blended_eddy_simulation_of_the_aerodynamic_and_aeroacoustic_characteristics_over_30P30N_high-lift_configuration/33954564 CC BY 4.0