Oblique shock wave interaction with turbulent boundary layer over a wavy surface

2017 ◽  
Author(s):  
Saeedur Rahman ◽  
Md. Saddam Hossain Joy ◽  
A. B. M. Toufique Hasan ◽  
Y. Mitsutake ◽  
S. Matsuo ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Shock Wave ◽  
Turbulent Boundary Layer ◽  
Wave Interaction ◽  
Oblique Shock ◽  
Wavy Surface ◽  
Oblique Shock Wave ◽  
Shock Wave Interaction

Effects of Surface Waviness on the Interaction of Oblique Shock Wave With Turbulent Boundary Layer

2017 ◽  
Vol 140 (4) ◽  
Author(s):  
Md. Saddam Hossain Joy ◽  
Saeedur Rahman ◽  
A. B. M. Toufique Hasan
Keyword(s):  
Boundary Layer ◽  
Shock Wave ◽  
Turbulent Boundary Layer ◽  
Flat Plate ◽  
Three Dimensional ◽  
Aerodynamic Characteristics ◽  
Oblique Shock ◽  
Wavy Surface ◽  
Oblique Shock Wave ◽  
Surface Waviness

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.

The Effect of Sweep on Conditions at Separation in Turbulent Boundary-Layer/Shock-Wave Interaction

1977 ◽  
Vol 28 (2) ◽  
pp. 111-122 ◽  
Author(s):  
D F Myring
Keyword(s):  
Boundary Layer ◽  
Shock Wave ◽  
Turbulent Boundary Layer ◽  
Pressure Rise ◽  
Prediction Method ◽  
Wave Interaction ◽  
Reynolds Numbers ◽  
Approximate Analysis ◽  
Integral Boundary ◽  
Shock Wave Interaction

SummaryAn approximate analysis of conditions at separation produced by turbulent boundary-layer/shock-wave interaction is presented for swept, cylindrically symmetric flows. An integral boundary-layer prediction method is used, incorporating Johnston crossflow profiles. The results indicate a marked reduction in pressure rise required to produce separation as sweep is increased. At low Reynolds numbers the skin friction at separation is inferred to be small, whereas at higher Reynolds numbers the presence of a vigorous streamwise flow may be detected. In the limiting case of zero sweep, or two-dimensional flow, predictions using the approximate analysis are shown to compare well with experimental results of pressure rise to separation.

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