2016•elib (German Aerospace Center)Requires access
Multi-PIV Measurements of an Adverse Pressure Gradient Turbulent Boundary Layer
Christian Willert, Christian J. Kähler, Andreas Schröder, Julio Soria, Michel Stanislas, Jean-Marc Foucaut, Sven Scharnowski, Rainer Hain, Joachim Klinner, Janos Agocs, Reinhard Geisler, Anni Röse, Callum Atkinson, Omid Amili, Chrstoph Cuvier, Sricharan Srinath, Jean-Philippe Laval
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Abstract
We report on a multi-national measurement campaign aimed at providing highly resolved flow field data of a turbulent boundary layer subjected to an adverse pressure gradient (APG). In the case of APGs the structure and dynamics of large scale turbulent flow structures along with their significance on the statistical properties of the flow is not well understood. Hence the fundamental aim was to resolve and characterise the large-scale coherent structures in an APG boundary layer flow. In addition to large-field-of-view PIV measurements using 16 sCMOS cameras along a 3.5m length, stereoscopic PIV measurements were performed at specific locations in order to also resolve the span-wise velocity statistics. Long-distance, high-speed micro-PIV measurements provided near wall statistics at selected locations including the time-resolved wall shear stress. The measurements were performed in the boundary layer wind tunnel of the Laboratoire de Mécanique de Lille (LML) and funded by EuHIT (www.euhit.org).
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