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- W4283219987 abstract "In the development of high-speed aerodynamic applications, it is necessary to consider how imperfect conditions can affect the dynamics of a system. This study aims to continue investigations into how a roughened surface will affect the behavior of a compressible turbulent boundary layer. Visualizations of the flow have shown the presence of near-wall streaks of high and low-speed fluid which have been a well documented coherent structure of turbulent boundary layers. Observations of the streaks in the rough wall cases show that the scale of their structure is small enough to allow navigation around the roughness elements. We suggest this may be a physical description of the mechanism responsible for the Reynolds number similarity hypothesis. Investigations into the skin friction of the surface have shown differences between the smooth and rough cases. The rough cases have shown significant large areas of high Cf which convect downstream and are affected by the presence of the roughness elements. The generation of turbulence kinetic energy was found to increase just past the peak of the roughness elements and become negative in the forward-facing portion of the roughness elements. This is consistent with what is observed regarding the pressure gradients along the surface. A direct calculation method was used to determine the effective Cf used for scaling of variables. This method proved particularly effective in analyzing a rough wall turbulent boundary layer due to the determination of the primary drag force on the surface which characterizes rough flow regimes." @default.
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- W4283219987 date "2022-06-20" @default.
- W4283219987 modified "2023-09-28" @default.
- W4283219987 title "Simulation of a High Reynolds Number Compressible Turbulent Boundary Layer Developing in the Presence of a Sinusoidal Plane" @default.
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- W4283219987 doi "https://doi.org/10.2514/6.2022-3251" @default.
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