Experimental Investigation of Three-Dimensional Structures in an Adverse Pressure Gradient Turbulent Boundary Layer

Michael Melnick, Brian Thurow, Timothy Fahringer
2012 42nd AIAA Fluid Dynamics Conference and Exhibit   unpublished
This paper presents a preliminary report on our application a newly built plenoptic camera to obtain three-dimensional, three-component particle image velocimetry ( PIV) on a turbulent boundary layer in a zero pressure gradient (ZPG) and adverse pressure gradient (APG) region of flow. A Stratford ramp was designed and constructed to produce an adverse pressure gradient turbulent boundary layer in the wind tunnel facility at Auburn University. Pressure measurements and 2-D PIV were performed to
more » ... haracterize the flow with and without the ramp. Proper orthogonal decomposition (POD) of the 2-D PIV images show some differences in the structures from ZPG and APG flows. A 3-D velocity field, 3-D vorticity field, and 2-D slices of velocity and vorticity are depicted for each case to show the unique potential of this new 3-D technique for investigation of structures in a turbulent boundary layer.
doi:10.2514/6.2012-2850 fatcat:ij6bmqz3tjd3zoq3gzhmf7vog4