Effects of Surface Waviness on the Interaction of Oblique Shock Wave With Turbulent Boundary Layer
Effects of Surface Waviness on the Interaction of Oblique Shock Wave With Turbulent Boundary Layer
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DOI：
10.1115/1.4038214
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发表时间：
2018-04
影响因子：
2
通讯作者：
M. S. H. Joy;S. Rahman;A. Hasan
中科院分区：
文献类型：
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作者：
M. S. H. Joy;S. Rahman;A. Hasan
本文研究了斜激波对波状表面上湍流边界层的干扰。斜激波是在自由飞行马赫数为2.0时由一个8 °楔形体产生的。数值计算采用三维雷诺平均Navier-Stokes（RANS）方程和k-ω剪切应力输运（SST）湍流模型。斜激波与平板相互作用的计算结果与实验测量和直接数值模拟（DNS）数据吻合良好。为了确定表面波纹度对激波/湍流边界层干扰（SWBLI）的影响，用波纹表面代替平板的一部分。对不同幅度的波振幅进行了计算。此外，波形表面的波长已经改变。结果表明，波纹表面的存在会在流场中产生附加激波和膨胀波，称为地形波。这种补充系统的波相互作用与对应的内在SWBLI在一个复杂的方式。研究了流动结构、分离行为和气动特性。结果表明，在波浪形表面上的SWBLI的情况下，振幅比波度的波长占主导地位。
Present investigation deals with the interaction of an incident oblique shock wave on a turbulent boundary layer over a wavy surface. The oblique shock wave was generated by an 8 deg wedge in a freestream Mach number of 2.0. Three-dimensional (3D) Reynolds-averaged Navier–Stokes (RANS) equations with k–ω shear stress transport (SST) turbulence model were used for numerical computation. The computed results are in good agreement with the experimental measurement and direct numerical simulation (DNS) data in case of the interaction of an oblique shock with plain flat plate. To identify the effect of surface waviness on shock wave/turbulent boundary layer interaction (SWBLI), a section of the flat plate was replaced by a wavy surface. Computations have been conducted for different magnitudes of wavy amplitude. Further, the wavelength of the wavy surface has been varied. Results showed that the presence of wavy surface induces supplementary shock and expansion waves in the flow field, which are referred as topographic waves. This supplementary system of waves interacts with the counterpart of intrinsic SWBLI in a complex manner. Flow structure, separation behavior, and aerodynamic characteristics are studied. It is revealed that the amplitude is dominant than the wavelength of waviness in case of SWBLI on a wavy surface.