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The HART II International Workshop: An Assessment of the State-of-the-Art in Comprehensive Code Prediction

van der Wall, Berend G. and Lim, Joon W. and Smith, Marilyn J. and Jung, Sung N. and Bailly, Joelle and Baeder, James D. and Boyd, Douglas D. Jr. (2013) The HART II International Workshop: An Assessment of the State-of-the-Art in Comprehensive Code Prediction. CEAS Aeronautical Journal, 4 (3), pp. 223-252. Springer. DOI: 10.1007/s13272-013-0077-9 ISSN 1869-5582

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Abstract

Despite significant advancements in computational fluid dynamics (CFD) and their coupling with computational structural dynamics (CSD, or comprehensive codes) for rotorcraft applications, CSD codes with their engineering level of modeling the rotor blade dynamics, the unsteady sectional aerodynamics and the vortical wake are still the workhorse for the majority of applications. This is especially true when a large number of parameter variations is to be performed and their impact on performance, structural loads, vibration and noise is to be judged in an approximate yet reliable and as accurate as possible manner. In this article, the capabilities of such codes are evaluated using the HART II International Workshop data base, focusing on a typical descent operating condition which includes strong blade-vortex interactions; a companion article addresses the CFD/CSD coupled approach. Three cases are of interest: the baseline case and two cases with 3/rev higher harmonic blade root pitch control (HHC) with different control phases employed. One setting is for minimum blade-vortex interaction noise radiation and the other one for minimum vibration generation. The challenge is to correctly predict the wake physics - especially for the cases with HHC - and all the dynamics, aerodynamics, modifications of the wake structure and the aero-acoustics coming with it. It is observed that the comprehensive codes used today have a surprisingly good predictive capability when they appropriately account for all of the physics involved. The minimum requirements to obtain these results are outlined.

Item URL in elib:https://elib.dlr.de/79243/
Document Type:Article
Title:The HART II International Workshop: An Assessment of the State-of-the-Art in Comprehensive Code Prediction
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
van der Wall, Berend G.Berend.vanderWall (at) dlr.deUNSPECIFIED
Lim, Joon W.US Army AFDD (AMRDEC)UNSPECIFIED
Smith, Marilyn J.Georgia Institute of TechnologyUNSPECIFIED
Jung, Sung N.Konkuk UniversityUNSPECIFIED
Bailly, JoelleONERAUNSPECIFIED
Baeder, James D.University of MarylandUNSPECIFIED
Boyd, Douglas D. Jr.NASA Langley Research CenterUNSPECIFIED
Date:September 2013
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:4
DOI :10.1007/s13272-013-0077-9
Page Range:pp. 223-252
Publisher:Springer
ISSN:1869-5582
Status:Published
Keywords:rotor aerodynamics, rotor dynamics, rotor wake, comprehensive code
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:23 Sep 2013 15:43
Last Modified:06 Sep 2019 15:24

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