Print Email Facebook Twitter On the combined flow and structural measurements via robotic volumetric PTV Title On the combined flow and structural measurements via robotic volumetric PTV Author Mitrotta, F.M.A. (TU Delft Aerodynamics) Sodja, J. (TU Delft Aerospace Structures & Computational Mechanics) Sciacchitano, A. (TU Delft Aerodynamics) Date 2022 Abstract This study describes a novel measurement approach for combined flow and structural measurements in wind tunnels using robotic volumetric particle tracking velocimetry (PTV). The measurement approach is based on the application of a particle tracking algorithm on images including flow or structure tracers, where the latter are implemented by means of fiducial markers. The main steps of the measurement procedure comprise the simultaneous acquisition of flow and structure tracers in the same images, the distinction of the tracers leading to separate flow and structure image sets, the application of Lagrangian particle tracking and the further post-processing, and recombination of the obtained data. The approach is applied to the fluid-structure interaction between a flexible plate with a span of 1.2 m and a periodic gust. The total measurement volume amounts approximately to 150 liters. A phase-averaged description of the FSI problem is presented, with the focus on the effects of the spatio-temporal averaging of the flow information. The structural displacements obtained from the PTV system are validated against a scanning vibrometer. The phase-averaged displacement of the markers is also analyzed, assessing both the validity of the phase-averaged approach and the physical coherence of their motion with respect to a structural model of the plate. It is found that robotic volumetric PTV is suitable for the measurement of large-scale structural displacements, while it should not be used to measure small-scale vibrations. Finally, a visualization of the combined measurement is presented, together with an analysis of the consistency between the measured structure and flow field. Subject aeroelasticityfluid-structure interactionHFSBrobotic volumetric PTVshake-the-boxwind tunnel To reference this document use: http://resolver.tudelft.nl/uuid:98432e4c-db33-4894-ace7-343a81326afc DOI https://doi.org/10.1088/1361-6501/ac41dd ISSN 0957-0233 Source Measurement Science and Technology, 33 (4) Part of collection Institutional Repository Document type journal article Rights © 2022 F.M.A. Mitrotta, J. Sodja, A. Sciacchitano Files PDF M_A_Mitrotta_2022_Meas._S ... 045201.pdf 13.43 MB Close viewer /islandora/object/uuid:98432e4c-db33-4894-ace7-343a81326afc/datastream/OBJ/view