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The HART II International Workshop: An Assessment of the State-of-the-Art in CFD/CSD Prediction

Smith, Marilyn J. and Lim, Joon W. and van der Wall, Berend G. and Baeder, James D. and Biedron, Robert T. and Boyd, Douglas D. Jr. and Jayaraman, Buvana and Jung, Sung N. and Min, Byung-Young (2013) The HART II International Workshop: An Assessment of the State-of-the-Art in CFD/CSD Prediction. CEAS Aeronautical Journal, 4 (4), pp. 345-372. Springer. DOI: 10.1007/s13272-013-0078-8 ISSN 1869-5582

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Abstract

Over the past decade, there have been significant advancements in the accuracy of rotor aeroelastic simulations with the application of computational fluid dynamics methods coupled with computational structural dynamics codes (CFD/CSD). The HART II International Workshop database, which includes descent operating conditions with strong blade-vortex interactions (BVI), provides a unique opportunity to assess the ability of CFD/CSD to capture these physics. In addition to a baseline case with BVI, two additional cases with 3/rev higher harmonic blade root pitch control (HHC) are available for comparison. The collaboration during the workshop permits assessment of structured, unstructured, and hybrid overset CFD/CSD methods from across the globe on the dynamics, aerodynamics, and wake structure. Evaluation of the plethora of CFD/CSD methods indicate that the most important numerical variables associated with most accurately capturing BVI are a two-equation or detached eddy simulation (DES)-based turbulence model and a sufficiently small time step. An appropriate trade-off between grid fidelity and spatial accuracy schemes also appears to be important for capturing BVI on the advancing rotor disk. Overall, the CFD/CSD methods generally fall within the same accuracy; cost-effective hybrid Navier-Stokes/Lagrangian wake methods tend to correlate less accurately with experiment and have larger data scatter than the full CFD/CSD methods for most parameters evaluated. The importance of modeling the fuselage is observed, and other requirements are discussed.

Item URL in elib:https://elib.dlr.de/79241/
Document Type:Article
Title:The HART II International Workshop: An Assessment of the State-of-the-Art in CFD/CSD Prediction
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Smith, Marilyn J.Georgia Inst. of TechnologyUNSPECIFIED
Lim, Joon W.US Army AFDD (AMRDEC)UNSPECIFIED
van der Wall, Berend G.Berend.vanderWall (at) dlr.deUNSPECIFIED
Baeder, James D.University of MarylandUNSPECIFIED
Biedron, Robert T.NASA Langley Research CenterUNSPECIFIED
Boyd, Douglas D. Jr.NASA Langley Research CenterUNSPECIFIED
Jayaraman, BuvanaScience & Technology Corp.UNSPECIFIED
Jung, Sung N.Konkuk UniversityUNSPECIFIED
Min, Byung-YoungGeorgia Institute of TechnologyUNSPECIFIED
Date:14 August 2013
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:4
DOI :10.1007/s13272-013-0078-8
Page Range:pp. 345-372
Publisher:Springer
ISSN:1869-5582
Status:Published
Keywords:rotor aerodynamics, rotor dynamics, rotor wake, rotor CFD
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Innovative Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: van der Wall, Prof. Dr. Berend G.
Deposited On:10 Sep 2013 13:04
Last Modified:06 Sep 2019 15:24

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