caa a22 4500 606197087 CHVBK 20210128100927.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00348-014-1870-x doi (NATIONALLICENCE)springer-10.1007/s00348-014-1870-x Loads and pressure evaluation of the flow around a flapping wing from instantaneous 3D velocity measurements [Elektronische Daten] [Thibaut Tronchin, Laurent David, Alain Farcy] The flow around a flapping wing is characterized by an unsteady evolution of three-dimensional vortices, which are one of the main sources of loads. The difficulty in directly measuring such low forces by means of sensors and the need of the characterization of the evolution of the flow have lead to the evaluation of loads using the integral form of the momentum equation. This paper describes methods for evaluating instantaneous loads and three-dimensional pressure fields using 3D3C velocity fields only. An evaluation of the accuracy of these methods using DNS velocity fields is presented. Loads and pressure fields are then calculated using scanning tomography PIV velocity fields, around a NACA 0012 airfoil for a flapping motion in a water tank at a Reynolds number of 1,000. The results suggest a sufficient accuracy of calculated pressure fields for a global analysis of the topology of the flow and for the evaluation of loads by integrating the calculated pressure field over the surface of the wing. Springer-Verlag Berlin Heidelberg, 2014 Tronchin Thibaut Poitiers, France aut David Laurent Poitiers, France aut Farcy Alain Poitiers, France aut Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-16 0723-4864 56:1<1 2015 56 348 https://doi.org/10.1007/s00348-014-1870-x 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/s00348-014-1870-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tronchin Thibaut Poitiers, France aut NATIONALLICENCE 700 1- David Laurent Poitiers, France aut NATIONALLICENCE 700 1- Farcy Alain Poitiers, France aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-16 0723-4864 56:1<1 2015 56 348