Akademik Veri Yönetim Sistemi
AIAA Science and Technology (SciTech) Forum, Maryland, Amerika Birleşik Devletleri, 23 - 27 Ocak 2023, (Tam Metin Bildiri)
For a few years, the concept of Active Flow Control (AFC) has found vast expansion for its immense technological importance. However, it has been mainly studied for flow separation control, transition delay, and improvement in aerodynamic efficiency with little emphasis on the effects on flight stability. Utilizing RANS-based CFD computations, forced periodic investigations were performed for the 3-dimensional wing with NACA 0018 airfoil with and without a steady-blowing jet near the leading edge to assess its effect on longitudinal stability characteristics. A satisfactory agreement between the 3-D static numerical simulations and the experimental results was found during the validation process. Although RANS CFD could not capture the non-linearity in the lift curve slope, the effects of the steady-blowing jet were sufficiently captured. The lift augmentation was more pronounced at higher angles of attack due to suppressing a more significant separation region. An increased leading-edge flow velocity created a low-pressure region on the wing's upper surface with slot blowing as compared to the no-blowing case. The results from flow physics analysis showed an upward destabilizing force causing a slight decrease in the combined dynamic pitch-damping derivatives.