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Insights on the unsteadiness and stall effects on the characteristics and responses of continuous wing-based systems
(2021-01-01)
The effects of the aerodynamic loads on continuous wing-based systems can be represented using a quasi-steady or a fully unsteady reduced-order modeling. Frequently, the quasi-steady formulation is used to model the ...
Fast multipole accelerated unsteady vortex lattice method based computations
(American Institute of Aeronautics and Astronautics Inc., 2019-06)
The authors present an accelerated aerodynamic computational model derived from the integration of the fast multipole method (FMM) with the unsteady vortex lattice method (UVLM) based aerodynamic model. It is determined ...
Unsteady and non-linear aeroelastic analysis of large horizontal-axis wind turbines
(Pergamon-Elsevier Science Ltd., 2014-01)
Analysis results, obtained from numerical simulation, for non-linear and unsteady aeroelastic behavior of large horizontal-axis wind turbines are presented in this paper. Simulations are carried out using a partitioned ...
Comparative study on analytical and computational aerodynamic models for flapping wings MAVs
(Royal Aeronautical Soc, 2020-07)
A range of quasi-steady and unsteady aerodynamic models are used to predict the aerodynamic forces experienced by a flapping wing and a detailed comparison amongst these predictions in provided. The complexity of the models ...
A numerical model to study the nonlinear and unsteady aerodynamics of bioinspired morphing-wing concepts
(SAGE Publications Inc., 2015-09)
In the present paper, a numerical model to study the nonlinear and unsteady aerodynamics of morphing-wing concepts inspired by bird flight is developed. The model includes: i) a wing topology inspired by gull wings; ii) a ...
Modified unsteady vortex-lattice method to study flapping wings in hover flight
(Amer Inst Aeronaut Astronaut, 2013-09)
A numerical-simulation tool is developed that is well suited for modeling the unsteady nonlinear aerodynamics of flying insects and small birds as well as biologically inspired flapping-wing micro air vehicles. The present ...
Application of the natural stress formulation for solving unsteady viscoelastic contraction flows
(Elsevier B.V., 2019-07-01)
We present a numerical scheme for a previously unexploited formulation of the equations for unsteady viscoelastic flow. The formulation aligns the polymer stress along particle paths/streamlines, utilising the characteristic ...
Simulation of unsteady laminar flow in models of terminal aneurysm of the basilar artery
(TAYLOR & FRANCIS LTD, 2005-05)
Blood flow dynamics play an important role in the pathogenesis and treatment of intracranial aneurysms. The evaluation of the velocity field in the aneurysm dome and neck is important for the correct placement of endovascular ...
Numerical simulation of scour around circular piles due to unsteady currents and oscillatory flows
(Taylor & Francis, 2018)
Numerical modeling of pile scour is performed due to the action of unsteady currents and oscillatory flow greens, using 3D Reynolds averaged Navier-Stokes (RANS) equations for the hydrodynamic description and the Exner ...
Assessment of Steady and Unsteady Friction Models in the Draining Processes of Hydraulic Installations
(Cartagena de Indias, 2021-07-08)
The study of draining processes without admitting air has been conducted using only steady friction formulations in the implementation of governing equations. However, this hydraulic event involves transitions from laminar ...