caa a22 4500 606197621 CHVBK 20210128100930.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s00348-015-2005-8 doi (NATIONALLICENCE)springer-10.1007/s00348-015-2005-8 Transformation of flow structure on a rotating wing due to variation of radius of gyration [Elektronische Daten] [Maxwell Wolfinger, Donald Rockwell] The flow structure on a rotating wing (rectangular plate) is characterized over a range of travel distance at different radii of gyration. Travel distance is defined as the length of the arc subtended by the radius of gyration. Stereoscopic particle image velocimetry is employed to determine the volumetric flow structure, in the form of three-dimensional surfaces of the q-criterion, helical density, and downwash velocity. These representations are complemented by sectional patterns of vorticity and tangential velocity. An increase in the radius of gyration reduces the influence of rotation on the flow structure. At small radius of gyration, a coherent leading-edge vortex develops rapidly and then persists over a range of travel distance. At moderate radius of gyration, this leading-edge vortex is replaced by an arch vortex, which develops relatively slowly over a larger travel distance, and is eventually swept into the wake of the wing. The foregoing classes of vortical structures are associated with distinctive patterns of: helical density, which represents the axial vorticity flux through the three-dimensional vortex system; downwash related to the strengths of the components of the vortex system; and tangential velocity associated with the extent of reverse flow, or stall. Springer-Verlag Berlin Heidelberg, 2015 Wolfinger Maxwell Lehigh University, 27 Memorial Drive West, 18015, Bethlehem, PA, USA aut Rockwell Donald Lehigh University, 27 Memorial Drive West, 18015, Bethlehem, PA, USA aut Experiments in Fluids Springer Berlin Heidelberg 56/7(2015-07-01), 1-18 0723-4864 56:7<1 2015 56 348 https://doi.org/10.1007/s00348-015-2005-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-2005-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wolfinger Maxwell Lehigh University, 27 Memorial Drive West, 18015, Bethlehem, PA, USA aut NATIONALLICENCE 700 1- Rockwell Donald Lehigh University, 27 Memorial Drive West, 18015, Bethlehem, PA, USA aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/7(2015-07-01), 1-18 0723-4864 56:7<1 2015 56 348