Real-time simulation of rotor inflow using a coupled flight dynamics and fluid dynamics simulation / J. Bludau, J. Rauleder, L. Friedmann, M. Hajek, Institute of Helicopter Technology Technical University of Munich, 80333 Munich, Germany ; Deutscher Luft- und Raumfahrtkongress 2016
VerfasserBludau, J. ; Rauleder, J. ; Friedmann, L. ; Hájek, M.
KörperschaftDeutscher Luft- und Raumfahrtkongress <65., 2016, Braunschweig>
Erschienen[Bonn] : [Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.], 2016
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In order to predict the rotorcraft motion in the vicinity of objects or their wake, a real-time capable model is presented. The dynamic in ow into the rotors was extracted from a real- time Lattice-Boltzmann uid simulation and fed into a blade element based rotorcraft ight dynamics code. To represent the in uence of arbitrary objects on the ight dynamics, the objects were modeled by boundary conditions in the Lattice-Boltzmann uid simulation and updated dynamically in every time step. This two-way coupled simulation enabled the prediction of the rotorcraft motion and ight dynamics in arbitrary situations without prior knowledge of the ow eld. To validate the e ect of objects on the in ow, the required power in hover and forward ight in ground e ect was evaluated. Furthermore, the rotorcraft motion due to a step input in hovering and forward ight was discussed. The results from the coupled uid dynamics/ ight dynamics model showed good agreement when compared to a more established reference model, namely the Pitt-Peters in ow model.