Three-Dimensional Flow Field Investigations on Pitching Low Aspect Ratio Wings at Low Reynolds Numbers

Conference paper (2013)
Copyright: © 2013 Ehlers, H.; Agocs, J.; Konrath, R.; Korkischko, I.; Schanz, D.; Geisler, R.; Willert, C.; Wokoeck, R.
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Published Date

01-07-2013

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Abstract

Three-dimensional, unsteady flow fields of a pitching low aspect ratio wing were measured by tomographic PIV [6] in air. The analysis of the vortex dominated flow field provides a deeper understanding of vortex interaction and three-dimensionality of the low Reynolds number (Re ? 10,000) flow. In order to recover the complete flow field the measurement set-up was designed to be traversable. A high spatial resolution and a large volume thickness could be achieved by a set of high sensitive sCMOS cameras. A specific feature of this campaign was to locate the measurement domain directly above the flat-plate-wing surface. Evaluation of the measurement data is performed by DLR in-house software. A selection of measurement results of this highly complex flow is presented in this paper.