Experimental investigation of turbulent flow in a cylinder-flat plate junction configuration with an upstream circular manipulator

Simultaneous time-resolved measurements of axial and vertical components of turbulent velocity were made in the corner and downstream of a cylinder-flat plate junction with and without a circular manipulator. The circular manipulator was placed upstream within the boundary layer above the flat plate surface. The boundary layer was tripped upstream by a wire affixed to the flat body to ensure a turbulent boundary layer. Results showed that the upstream separation line is moved closer to the leading edge of the cylinder with the manipulator in place. In the area near the corner, the axial mean velocity is decreased while there are corresponding increases in the variances of turbulent velocity in the axial and vertical directions indicating enhancement of the skew-induced secondary flow at the corner.