雷诺应力模型在带冰翼型变前/后缘流动的应用

doi:10.7527/S1000-6893.2026.33942

Abstract

Abstract: Flow control research on iced airfoils involves numerous geometric and flow parameters. Scale-resolving methods such as Detached Eddy Simulation(DES) can accurately predict the flow separation characteristics of iced airfoils, yet incur extremely high computational costs when coping with massive working conditions. As an advanced Reynolds-averaged turbulence model, the Reynolds-Stress Model (RSM) is more applicable to separation and vortex dominated flows compared with one-equation and two-equation Eddy Viscosity Models(EVM). Nevertheless, it still suffers from deficiencies in predicting the separation zone length and reattachment flow morphology for separated flows over iced wings. Based on the time power-law scale RSM developed by our research team, corrections for the separated shear layer and negative equivalent eddy viscosity are proposed for the scale equation and shear stress equation, respectively. The improvements in flow separation and reattachment performance are validated on three typical iced airfoils with glaze ice, streamwise ice and ridge ice. Furthermore, combined with the radial basis function mesh deformation program, the improved model is adopted to investigate the control mechanism of leading-edge and trailing-edge variable camber on post-ice flow separation for the three iced airfoils.The results demonstrate that for airfoils with glaze ice and streamwise ice, leading-edge downward deflection can advance the flow reattachment point, reduce the scale of the post-ice recirculation zone, and thereby enhance the ice tolerance capacity. For the ridge ice configuration, the effect of leading-edge variable camber is strongly correlated with its installation position on the wing. Leading-edge downward deformation barely alleviates the recirculation zone, and the trailing-edge variable camber strategy is therefore required.

Key words: Iced wing, Reynolds-stress model, Separation flow, Flexible wing, Dynamic mesh

CLC Number:

V211.3

References

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Application of Reynolds-stress model in iced airfoils flow with variable leading/trailing edge

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