In WP1 the Kick-Off Meeting of the whole consortium took place on September 13-14, 2018 at DLR Göttingen together with the PO and AB, the HOMER Teamsite
https://teamsites-extranet.dlr.de/as/homer/SitePages/Home.aspx(opens in new window) for restricted access to the consortium members, the PO and the AB members for internal exchange of documents has been created, the WPC (Work Package Committee) and the PCC (Project Coordination Committee) WebEx/Telcon Meetings have been held regularly (almost every 3 months). A full HOMÈR consortium meeting has been organized on July 25th, 2019 in Munich.The HOMER Webpage describing the project aims along the different objectives resp. Work Packages and publishing first results to external visitors at
https://www.dlr.de/as/en/homer(opens in new window) has been maintained.
In WP2 the assessment and validation of uncertainty quantification and performance measures of experimental measurement methods used in the WPs 3, 4 and 5 are under development. Data assimilation approaches allowing e.g. to determine pressure and loads distributions from particle tracks are developed and assessed by benchmark tests with synthetic and real experiments. A datasets on a fluid-structure interaction configuration has been generated numerically mimicking the experimental conditions of Task 3.1 and serve as benchmark test data including uncertainty quantification. This simulation data is used as ground truth for an international challenge on LPT and DA linked to a Workshop on WP 2 (
http://cfdforpiv.dlr.de(opens in new window)) and as well for the HOMER partners. Further work is dedicated to approaches aiming at improving the modelling of fluid flows, of structural dynamics, and also of models targeting their coupled dynamics. The final objective of these works is to provide more reliable models, complying with experimental data, to investigate complex fluid and fluid-structure phenomena.
In WP3 the assessment and validation of the HOMER experimental methodology, optical surface deformation measurement and velocimetry-based surface-pressure measurement techniques, have been achieved under experimental conditions. WP3 contains four tasks that address these aspects in different conditions. A turbulent boundary layer interacting with an actuated flexible surface panel has been investigated. Furthermore, small- and large-scale experiments in water- and wind tunnels, using simultaneous volumetric flow and model displacement measurements, on rigid and flexible wing models have been prepared and performed. Additionally, CFD simulations and structural analysis are used to support the design of the final experiments
In WP4 complete hydro- and aeroelasticity problems at low to moderate Reynolds numbers (1000 < Re < 2x10⁵) are under experimental investigation. Simultaneous measurements and subsequent computations of the three components of the Collar triangle are and will be performed, with the objective of fully resolving the unsteady dynamics of moving, flapping and/or deforming wings and surface panels. Of particular interest are the response, self-sustained motions and deformations of immersed bodies depending on their constitutive material and structure.
In WP5 the fluid structure interaction (FSI) of oscillating and deformable airfoil models at cruise flight and off-design Mach numbers are under investigation by using sophisticated optical imaging techniques (2D/3D PIV/PTV, PSP, Schlieren, Deformation). To accomplish this goal, five tasks were defined within this WP. Here, in total three 2D rigid wings of the same geometry (OAT15A), but with different degrees-of freedom for flutter analysis and with a flow control device, and one flexible wing (Jedelsky) are investigated in three independent transonic wind tunnel tests.
