Effects of Surface Waviness on the Interaction of Oblique Shock Wave With Turbulent Boundary Layer
| Autor: | A. B. M. Toufique Hasan, Md. Saddam Hossain Joy, Saeedur Rahman |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Shock wave 020301 aerospace & aeronautics Waviness K-epsilon turbulence model Mechanical Engineering Boundary layer control 02 engineering and technology Mechanics Boundary layer thickness Mach wave 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics Boundary layer 0203 mechanical engineering Physics::Space Physics 0103 physical sciences Oblique shock |
| Zdroj: | Journal of Fluids Engineering. 140 |
| ISSN: | 1528-901X 0098-2202 |
| DOI: | 10.1115/1.4038214 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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