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Summary of Data from the Fifth Computational Fluid Dynamics Drag Prediction Workshop

Levy, David and Laflin, Kelly and Tinoco, Edward and Vassberg, John and Mani, Mori and Rider, Ben and Rumsey, Christopher and Wahls, Richard and Morrison, Joseph and Brodersen, Olaf and Crippa, Simone and Mavriplis, Dimitri and Murayama, Mitsuhiro (2014) Summary of Data from the Fifth Computational Fluid Dynamics Drag Prediction Workshop. Journal of Aircraft, 51 (4), pp. 1194-1213. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.C032389 ISSN 0021-8669

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Official URL: http://arc.aiaa.org/doi/pdf/10.2514/1.C032389


Results from the Fifth AIAA Computational Fluid Dynamics Drag Prediction Workshop are presented. As with past workshops, numerical calculations are performed using industry-relevant geometry, methodology, and test cases. This workshop focused on force/moment predictions for the NASA Common Research Model wing-body configuration, including a grid refinement study and an optional buffet study. The grid refinement study used a common grid sequence derived from a multiblock topology structured grid. Six levels of refinement were created, resulting in grids ranging from 0 . 64 × 10 6 to 138 × 10 6 hexahedra, a much larger range than is typically seen. The gridswerethentransformedintostructuredoversetandhexahedral,prismatic,tetrahedral,andhybridunstructured formats all using the same basic cloud of points. This unique collection of grids was designed to isolate the effects of grid type and solution algorithm by using identical point distributions. This study showed reduced scatter and standarddeviationfrompreviousworkshops.Thesecondtestcasestudiedbuffetonsetat M � 0 . 85 usingthemedium grid ( 5 . 1 × 10 6 nodes) from the sequence described earlier. The prescribed alpha sweep used finely spaced intervals through the zone where wing separation was expected to begin. Some solutions exhibited a large side of body separationbubblethatwasnotobservedinthewind-tunnelresults.Anoptionalthirdcaseusedthreesetsofgeometry, grids, and conditions from the Turbulence Model Resource website prepared by the Turbulence Model Benchmarking Working Group. These simple cases were intended to help identifypotential differences in turbulence model implementation. Although a few outliers and issues affecting consistency were identified, the majority of participants produced consistent results.

Item URL in elib:https://elib.dlr.de/90550/
Document Type:Article
Title:Summary of Data from the Fifth Computational Fluid Dynamics Drag Prediction Workshop
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Levy, DavidCessnaUNSPECIFIED
Laflin, KellyCessnaUNSPECIFIED
Tinoco, EdwardBoeingUNSPECIFIED
Vassberg, JohnBoeingUNSPECIFIED
Rumsey, ChristopherNASAUNSPECIFIED
Brodersen, OlafO.Brodersen (at) dlr.deUNSPECIFIED
Crippa, SimoneAirbusUNSPECIFIED
Mavriplis, DimitriUniversity of WyomingUNSPECIFIED
Murayama, MitsuhiroJAXAUNSPECIFIED
Date:July 2014
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.2514/1.C032389
Page Range:pp. 1194-1213
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Series Name:Journal of Aircraft
Keywords:CFD Drag Prediction Workshop, Common Research Model
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: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Brodersen, Dr.-Ing. Olaf
Deposited On:18 Sep 2014 14:21
Last Modified:08 Mar 2018 18:41

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