Abstract
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 characterize 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.
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