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

Auerswald, Torsten and Bange, Jens and Knopp, Tobias and Weinman, Keith and Radespiel, Rolf (2012) Large-Eddy Simulations of realistic atmospheric turbulence with the DLR-TAU-code initialized by in situ airborne measurements. Computers & Fluids, 66 (08), pp. 121-129. Elsevier. DOI: 10.1016/j.compfluid.2012.06.013 ISSN 0045-7930

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Official URL: http://www.sciencedirect.com/science/article/pii/S0045793012002368

Abstract

In this paper the numerical simulation of a turbulent flow in the atmospheric boundary layer (ABL) with a Large-Eddy Simulation (LES)-model is discussed. The results of this work are intended to be used for the numerical simulation of turbulent flows around an airfoil. To simulate the characteristics of the ABL flow and its influence on the airfoil realistically the flow upstream of the airfoil has to be turbulent with statistical properties that are comparable to those found in atmospheric measurements. To achieve this goal, a method to generate synthetic turbulent wind fields was used to initialize an LES model which is able to simulate the turbulent flow around an airfoil. For the initial turbulent wind field to contain realistic statistics of atmospheric turbulence, data taken with the Helipod system are used. The Helipod is a helicopter-borne measurement probe that is able to take high-resolution measurements of temperature, wind vector and humidity. The statistical properties that are used as input parameters for the turbulence generator are the spectral energy, the correlation matrix and the variances of the three components of the wind vector. The LES model used in this project is the flow solver TAU developed by the German Aerospace Center (DLR). TAU is a compressible computational fluid dynamics (CFDs) tool that is able to compute the flow around obstacles (e.g. parts of aircrafts or even whole aircrafts) on an unstructured grid. Calculations with TAU can be performed in Reynolds-Averaged Navier–Stokes-, LES- or Detached Eddy Simulation-mode using different sub-grid scale models.

Item URL in elib:https://elib.dlr.de/97381/
Document Type:Article
Additional Information:Available online 21 June 2012
Title:Large-Eddy Simulations of realistic atmospheric turbulence with the DLR-TAU-code initialized by in situ airborne measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Auerswald, TorstenCenter for Applied Geoscience, Universität Tübingen, GermanyUNSPECIFIED
Bange, JensCenter for Applied Geoscience, Universität Tübingen, GermanyUNSPECIFIED
Knopp, Tobiastobias.knopp (at) dlr.deUNSPECIFIED
Weinman, Keithkeith.weinman (at) dlr.deUNSPECIFIED
Radespiel, RolfTU BraunschweigUNSPECIFIED
Date:2012
Journal or Publication Title:Computers & Fluids
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:66
DOI :10.1016/j.compfluid.2012.06.013
Page Range:pp. 121-129
Publisher:Elsevier
ISSN:0045-7930
Status:Published
Keywords:Large-Eddy Simulation Atmospheric boundary layer Synthetic turbulence
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Micknaus, Ilka
Deposited On:24 Jul 2015 13:33
Last Modified:06 Sep 2019 15:18

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