Reference : Unsteady aerodynamics and nonlinear dynamics of freefalling rotating seeds
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Aerospace & aeronautics engineering
Engineering, computing & technology : Multidisciplinary, general & others
http://hdl.handle.net/2268/229196
Unsteady aerodynamics and nonlinear dynamics of freefalling rotating seeds
English
Roccia, Bruno [National Council of Scientific and Technological Research - Argentina > > > >]
Verstraete, M. L. [National Council of Scientific and Technological Research - Argentina > > > >]
Dimitriadis, Grigorios mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale >]
Bruls, Olivier mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire des Systèmes Multicorps et Mécatroniques >]
Preidikman, S. [National Council of Scientific and Technological Research - Argentina > > > >]
Sep-2018
Proceedings of the International Conference on Noise and Vibration Engineering, ISMA 2018
KUL
No
No
International
Leuven
Belgium
International Conference on Noise and Vibration Engineering, ISMA 2018
from 17-09-2018 to 19-09-2018
KUL
Leuven
Belgium
[en] Unsteady aerodynamics ; Rotating seeds ; Nonlinear dynamics ; Vortex lattice method
[en] This work presents a three-dimensional numerical tool that is suitable for studying the aerodynamics and nonlinear dynamics of free-falling rotating seeds like samaras. The proposed simulation framework consists of a modified version of the unsteady vortex-lattice method (enhanced by including a diffusion model and the leading-edge vortex contribution by means of the Polhamus analogy) coupled with a multibody rigid dynamic model for the whole seed. The numerical scheme adopted by the aerodynamic subsystem is based on an explicit low-order integrator (Euler's explicit first-order method). On the other hand, the equations of motion associated with the structural part are integrated in the time domain using a second-order Lie group integrator based on an extension of the classical generalized- method for dynamical systems. Among the main results obtained, it is found that the predicted terminal descending velocity and angular velocity (around the vertical axis) are in close agreement with experimental results reported in the literature.
Researchers ; Professionals
http://hdl.handle.net/2268/229196

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