Large-Eddy Simulations of realistic atmospheric turbulence with the DLR-TAU-code initialized by in situ airborne measurements

Auerswald, Torsten; Bange, Jens; Knopp, Tobias; Weinman, Keith; Radespiel, Rolf

doi:10.1016/j.compfluid.2012.06.013

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…In this study, the CFD tool used to simulate gust aerodynamic response is the DLR TAU code. 22,23 It is a three-dimensional finite volume scheme for hybrid grids. The solver uses an edge-based dual-cell method to solve the URANS equations with the Menter shear stress transport k–ω model.…”

Section: Methodsmentioning

confidence: 99%

A methodological exploration for efficient prediction of airfoil response to gusts in wind engineering

Wang

2019

Proceedings of the Institution of Mechanical Engineers, Part A:

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This paper presents several approaches for efficient estimation of airfoil response to gust via computational fluid dynamics and reduced-order modeling. A computational fluid dynamics code enabling simulation of aerodynamics under an arbitrary-shaped discrete gust is adopted. Convolution models using baseline sharp-edge gust response either obtained by the closed-form Küssner functions or computational fluid dynamics methods are established. A parametric approximation function model for gust response is identified via the least square optimization of the computational fluid dynamics-obtained sharp-edge responses. Finally, an example taking advantage of the aerodynamic response by the above methods to simulate the aeroelastics of an airfoil performing a plunging-twisting coupled motion under various gusts is presented. The present practice indicates that the reduced-order modelings are not only more efficient compared to direct computational fluid dynamics simulations, but also have a satisfactory accuracy in gust response predictions.

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Section: Methodsmentioning

confidence: 99%

A methodological exploration for efficient prediction of airfoil response to gusts in wind engineering

Wang

2019

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…By applying the Cholesky decomposition, the wind field can be modified to possess a predefined correlation matrix which introduces anisotropy. With a suited scaling of the resulting wind field the variances from the measurement can be met 16 .…”

Section: Gust Modelingmentioning

confidence: 99%

Simulation of Wing Stall

Radespiel

François

Hoppmann

et al. 2013

43rd Fluid Dynamics Conference

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Simulation capabilities for low-speed aircraft stall prediction are important for determining the limits of safe aircraft operations during design processes. The simulations are extremely demanding in terms of physical models involved, overall computation effort, and the needed efforts for validation. The present paper describes coordinated, fundamental research into new simulation methodologies for wing stall that also include the effects of atmospheric gusts. The research is carried out by the DFG funded Research Unit FOR 1066 composed of German Universities and the German Aerospace Center, DLR. The research Unit investigates advanced models of turbulence, advanced physics-based gust models, and new numerical approaches for gust simulation. These modeling and computational activities are supplemented by an unique validation experiment, that aims at providing stall data on a high-lift wing with well defined, generic distortions of the onset flow.

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“…Since this appears unfeasible, different approaches have been proposed to introduce turbulence closer to the focus region. It is, for example, possible to introduce turbulence by superposition from an overlapping mesh as proposed in [8]. This requires the solver software being capable of handling mesh overlays.…”

Section: Introductionmentioning

confidence: 99%

Controlled Synthetic Freestream Turbulence Intensity Introduced by a Local Volume Force

Tangermann

Klein

2020

Fluids

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Generating freestream turbulence within the computational domain instead of applying it as a boundary condition requires a method to introduce the turbulent fluctuations at a specific location. A method based on applying local volume forces has been adapted and supplemented with a control loop in order to compensate for alterations of the turbulence structure resulting from the numerical treatment and physical reasons. The criteria for the tuning of the controller have been developed and the performance of the approach has been assessed. The capabilities of the method are demonstrated for the flow around an airfoil at high angle of attack and with massive flow separation.

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Large-Eddy Simulations of realistic atmospheric turbulence with the DLR-TAU-code initialized by in situ airborne measurements

Cited by 6 publications

References 21 publications

A methodological exploration for efficient prediction of airfoil response to gusts in wind engineering

A methodological exploration for efficient prediction of airfoil response to gusts in wind engineering

Simulation of Wing Stall

Controlled Synthetic Freestream Turbulence Intensity Introduced by a Local Volume Force

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