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Precomputed Panel Solver for Aerodynamics Simulation

Haoran Xie, Takeo Igarashi, Kazunori Miyata
2018 ACM Transactions on Graphics  
Our model enables natural and real-time aerodynamics simulations combined with general rigid-body simulators for interactive animation. We also present a design system for original gliders.  ...  The proposed aerodynamics model improves the potential theory-based panel method. Furthermore, a new quadratic expression for aerodynamic forces and moments is proposed.  ...  ACKNOWLEDGMENTS The authors thank the reviewers for their valuable comments. We thank Haibin Huang for sharing aircraft models and Oliver van Kaick for shape segmentation codes.  ... 
doi:10.1145/3185767 fatcat:amr7e437o5drtaft4v74paarwi

Integrated free-form method for aerostructural optimization of wind turbine blades

R. Barrett, A. Ning
2018 Wind Energy  
The free-form method allows for a complete range of airfoil shapes, but without precomputation.  ...  Optimizing the NREL 5-MW reference turbine showed COE reductions of 2.0%, 4.2%, and 4.7% when using XFOIL and 2.7%, 6.0%, and 6.7% when using RANS CFD for the sequential, precomputational, and free-form  ...  to a panel method, XFOIL.  ... 
doi:10.1002/we.2186 fatcat:s7tezoppojbslj76iidhtw5tjy

Breakup prediction under uncertainty: Application to upper stage controlled reentries from GTO orbit

Francois Sanson, Charles Bertorello, Jean-Marc Bouilly, Pietro M. Congedo
2019 Aerospace Science and Technology  
More and more human-made space objects re-enter the atmosphere, and yet the risk for human population remains often unknown because predicting their reentry trajectories is formidably complex.  ...  While falling back on Earth, the space object absorbs large amounts of thermal energy that affects its structural integrity.It undergoes strong aerodynamic forces that lead to one or several  ...  We also thank Celia Finzi and Gregory Pinaud for their fruitful advice on breakup modelling and Francois Lemaire for providing reentry uncertainties.  ... 
doi:10.1016/j.ast.2019.02.031 fatcat:72jzipztyfchdkqanmvuhqn2yi

A Hybrid Non-Linear Unsteady Vortex Lattice-Vortex Particle Method for Rotor Blades Aerodynamic Simulations

Vincent Proulx-Cabana, Minh Tuan Nguyen, Sebastien Prothin, Guilhem Michon, Eric Laurendeau
2022 Fluids  
The method is of interest for the fast aerodynamic prediction of helicopter and smaller rotor blades.  ...  The standard Vreman subgrid scale model is incorporated in the context of a large eddy simulation for mesh-free VPM to stabilize the wake development via particle strength exchange (PSE).  ...  For LES computations, the gradient of the filtered velocity u is precomputed using FMM for each particle.  ... 
doi:10.3390/fluids7020081 fatcat:gdal2ckwzfahtiyfuzu3nbxo4u

Modeling of Flight Dynamics of Morphing Wing Aircraft

B. Obradovic, K. Subbarao
2011 Journal of Aircraft  
The simulation infrastructure is set up as a MATLAB class library with two basic types: models and solvers.  ...  In this paper, a simulation methodology suitable for such aircraft is presented, accounting for the changes in both the aerodynamic and inertial properties.  ... 
doi:10.2514/1.c000269 fatcat:wt7nhhku7vfbdizkndvx3kbihm

Multipoint high-fidelity CFD-based aerodynamic shape optimization of a 10 MW wind turbine

Mads H. Aa. Madsen, Frederik Zahle, Niels N. Sørensen, Joaquim R. R. A. Martins
2019 Wind Energy Science  
In addition, we compare two different CFD solvers to quantify the effect of modeling compressibility and to estimate the accuracy of the chosen grid resolution and order of convergence of the solver.  ...  This work does not address evaluation of extreme loads used for structural sizing, where BEM-based methods have proven very accurate, and therefore will likely remain the method of choice.</p>  ...  We thank, in particular, Eirikur Jonsson for assistance with programs in the MACH framework, Nicholas Bons for helping with pyGeo, and Anil Yildirim for his assistance with the ANK solver.  ... 
doi:10.5194/wes-4-163-2019 fatcat:tgfwsof2x5bwhhjvfecdldvfky

Adaptive Reduced-Order-Model-Based Control-Law Design for Active Flutter Suppression

Gang Chen, Jian Sun, Yue-Ming Li
2012 Journal of Aircraft  
A robust gain-scheduling control-law design method for active flutter suppression based on the proposed linear parametervarying model is investigated.  ...  The design of classic active flutter controllers has often been based on low-fidelity and low-accuracy linear aerodynamic models.  ...  M. for their helpful comments on the manuscript.  ... 
doi:10.2514/1.c031236 fatcat:rqsepdmv5bhghowggaaq2vbmku

Towards an Efficient Task-Based Parallelization over a Runtime System of an Explicit Finite-Volume CFD Code with Adaptive Time Stepping

Jean Marie Couteyen Carpaye, Jean Roman, Pierre Brenner
2016 2016 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW)  
FLUSEPA 1 is an advanced simulation tool which performs a large panel of aerodynamic studies.  ...  We validate our solution on the simulation of a take-off blast wave propagation for Ariane 5 launcher.  ...  MPI + TASK DESIGN OF THE AERODYNAMIC SOLVER A.  ... 
doi:10.1109/ipdpsw.2016.125 dblp:conf/ipps/CarpayeRB16 fatcat:jm5zzlu3afbalewxs5ajbn3hwe

Green Aviation Papers, Call and Recognition

Thomas Weeks
2011 Journal of Aircraft  
3) The CFD solver computes the aerodynamic loads based on the geometry received from the MSD solver. 4) The CFD solver sends the aerodynamic loads to the MSD solver. 5) The MSD solver uses the aerodynamic  ...  Secondly, the precomputed nature of tables lacks the ability to describe hysteresis of the aerodynamic phenomena.  ... 
doi:10.2514/1.c031282 fatcat:xzmvtywxnjdrtpjwza2v6ajhtq

Aeroelastic large eddy simulations using vortex methods: unfrozen turbulent and sheared inflow

E Branlard, G Papadakis, M Gaunaa, G Winckelmans, T J Larsen
2015 Journal of Physics, Conference Series  
Acknowledgments The work was funded by the Danish Council for Strategic Research (DSF), under contract 2104-09-0026, Center for Computational Wind Turbine Aerodynamics and Atmospheric Turbulence.  ...  For the Poisson solver, both the order of the solver and the order of the differentiation scheme are important.  ...  A precomputed synthetic velocity component is added to the induced velocities to include the effect of turbulence [1] .  ... 
doi:10.1088/1742-6596/625/1/012019 fatcat:wvi7ogefyfabvpdtfix3v3y3pq

Compact Methodology for Computing Limit-Cycle Oscillations in Aeroelasticity

Bogdan I. Epureanu, Earl H. Dowell
2003 Journal of Aircraft  
The example used for testing the identified reduced-order models is a numerical simulation of an aeroelastic system composed of a panel forced by a buffeting aerodynamic load.  ...  Panel Forced by Buffeting Aerodynamic Loads The nonlinear aeroelastic system used for testing the method- ology presented in the preceding section is a panel responding to a buffeting aerodynamic flow.  ... 
doi:10.2514/2.6880 fatcat:ofghgimaojaolo4umewadxtam4

A Simplified Modeling Approach of Floating Offshore Wind Turbines for Dynamic Simulations

Javier López-Queija, Eider Robles, Jose Ignacio Llorente, Imanol Touzon, Joseba López-Mendia
2022 Energies  
Hydrodynamic loads are precomputed using a panel code solver and the mooring forces are obtained using a look-up table for different system displacements.  ...  Aerodynamic loads are calculated using the wind turbine power performance curves obtained in a preprocessing step.  ...  Acknowledgments: The authors acknowledge NAUTILUS Floating Solutions and Tecnalia R&I for their support of the PhD thesis of Javier Lopez-Queija.  ... 
doi:10.3390/en15062228 fatcat:baoorpdutza4vgisva4sscjbji

Reduced-Order Modeling of an Elastic Panel in Transonic Flow

David J. Lucia, Philip S. Beran, Paul I. King
2003 Journal of Aircraft  
A nonlinear coupling of the two- dimensional Euler equations and the von Karman plate equation simulates the dynamics of flow over a flexible panel.  ...  Each solver is referred to by these key values for convenience.  ... 
doi:10.2514/2.3098 fatcat:axzvrtmfd5dgzk2quutyiydvcm

Modal locking between vocal fold and vocal tract oscillations: Simulations in time domain [article]

Atte Aalto, Tiina Murtola, Jarmo Malinen, Daniel Aalto, Martti Vainio
2017 arXiv   pre-print
The simulations reveal a locking pattern of the fo-trajectory at f_R1 of [i] in falling and rising glides.  ...  The model is used to simulate rising and falling pitch glides of [a, i] in the fundamental frequency (f_o) interval [150 Hz, 320 Hz].  ...  The authors would like to thank the four anonymous reviewers in 2013 and 2016 for comments leading to many improvements of the model.  ... 
arXiv:1506.01395v2 fatcat:eeguajpusbgwzji2tg663papcy

Multibody modeling for concept-level floating offshore wind turbine design

Frank Lemmer, Wei Yu, Birger Luhmann, David Schlipf, Po Wen Cheng
2020 Multibody system dynamics  
The aerodynamic model is a quasistatic actuator disk model.  ...  One-hour simulations complete in about 25 seconds and even less in the case of the frequency-domain model.  ...  The authors would like to express their gratitude for the continuous support of Dr. Jason Jonkman of NREL related to the use and theory behind the FAST open-source simulator.  ... 
doi:10.1007/s11044-020-09729-x fatcat:mphe7jg2xjdhndnpa47f2zg22m
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