Experimental Investigation of Base Drag Reduction on a Two-Dimensional Body Using Boundary Layer Manipulation

Durgesh, Vibhav; Naughton, Jonathan W.; Whitmore, Steven

doi:10.2514/6.2004-904

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2016

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“…The inlet has a honeycomb insert and three screens located upstream of a contraction with 12:1 area ratio. The measured free-stream turbulence in the test section from previous experiments is approximately 0.3 % (Durgesh et al 2004). Airfoils are installed vertically inside the test section, as shown in the experimental arrangement in Fig.…”

Section: Wind Tunnel Setupmentioning

confidence: 99%

Global surface pressure measurements of static and dynamic stall on a wind turbine airfoil at low Reynolds number

et al. 2016

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selected phase positions, capturing the breakdown of nominally two-dimensional flow near lift stall, development of post-stall suction near the trailing edge, and a highly threedimensional topology as the flow reattaches. Structural patterns in the surface pressure topologies are considered from the analysis of the individual PSP snapshots, enabled by a laser-based excitation system that achieves sufficient signal-to-noise ratio in the single-shot images. The PSP results are found to be in general agreement with observations about the steady and unsteady stall characteristics expected for the airfoil.

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Section: Wind Tunnel Setupmentioning

confidence: 99%