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Oblique Shock Wave Interaction with Turbulent Boundary Layer over a Wavy Surface

机译:在波浪表面上与湍流边界层的斜冲击波相互作用

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A numerical computation was performed of an oblique shock wave impinging on turbulent boundary layer developing on a flat surface. The free stream flow was at M_∞ = 2.0 with unit Reynolds number, Re = 10.5×10~6 m~(-1). A wedge having an angle of 8° with the free stream flow was used to generate the oblique shock wave. Three dimensional Reynolds averaged Navier-Stokes (RANS) steady simulation with k-ω SST turbulence model was used. The numerically obtained results were validated with experimental data obtained at same flow conditions. Periodic waviness was introduced to a portion of the wall to investigate its effect on shock wave turbulent boundary layer interaction. The geometry of wall waviness was characterized by amplitude and number of cycles. Different cases were studied by varying the amplitude of waviness. The presence of wall waviness affected shock structure and flow separation patterns. Variations of flow properties with respect to waviness amplitude were also studied.
机译:对冲击平坦表面上显影的湍流边界层的倾斜冲击波进行了数值计算。自由流流程为m_∞= 2.0,单位雷诺数,Re = 10.5×10〜6 m〜(-1)。使用具有自由流流程的角度为8°的楔形物用于产生倾斜冲击波。使用了三维雷诺平均使用K-ωSST湍流模型的Navier-Stokes(RANS)稳定模拟。使用在相同的流动条件下获得的实验数据验证数值获得的结果。将周期性波纹引入壁的一部分,以研究其对冲击波湍流边界层相互作用的影响。壁波状的几何形状的特征在于脉冲幅度和循环次数。通过改变波纹的幅度来研究不同的病例。壁波感的存在影响了休克结构和流动分离图案。还研究了相对于波状振幅的流动性能的变化。

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