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Numerical investigation of three-dimensional dynamic stall on an oscillating finite wing

Kaufmann, Kurt and Costes, Michel and Richez, Francois and Gardner, Anthony Donald and Le Pape, Arnaud (2014) Numerical investigation of three-dimensional dynamic stall on an oscillating finite wing. AHS 70th Annual Forum and Technology Display, 20. - 22. May 2014, Montréal, Québec, Canada.

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Abstract

Three-dimensional numerical computations using ONERA’s structured elsA code and the unstructured DLR-TAU code are compared with the OA209 finite wing experiments in static stall and dynamic stall conditions at a Mach number of 0.16 and a Reynolds number of 1x10^6. The DLR-TAU computations were run with the Spalart-Allmaras and Menter SST turbulence models, and the elsA computations were carried out using the Spalart-Allmaras and the k-w Kok + SST turbulence models. Although comparable grids were used the static simulations show large discrepancies in the stall region between the structured and unstructured approaches. Large differences for the three-dimensional dynamic stall case are obtained with the computations using the Spalart-Allmaras turbulence model showing no flow separation in contrast to the experiment. The three-dimensional dynamic stall computations with the two-equation turbulence models are in good agreement with the unsteady pressure measurements and flow field visualizations of the experiment, but also show a shift in the stall angle compared to the experiment. The analysis of the flow field around the finite wing using the numerical simulations reveals the evolution of the omega-shaped vortex, generated by the interaction of the blade tip vortex.

Item URL in elib:https://elib.dlr.de/85019/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical investigation of three-dimensional dynamic stall on an oscillating finite wing
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kaufmann, Kurtkurt.kaufmann (at) dlr.deUNSPECIFIED
Costes, MichelONERA - The French Aerospace Lab, F-92190, Meudon, FranceUNSPECIFIED
Richez, FrancoisONERA - The French Aerospace Lab, F-92190, Meudon, FranceUNSPECIFIED
Gardner, Anthony Donaldtony.gardner (at) dlr.deUNSPECIFIED
Le Pape, ArnaudONERA - The French Aerospace Lab, F-92190, Meudon, FranceUNSPECIFIED
Date:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-12
Series Name:Conference Proceedings on CD-ROM
Status:Published
Keywords:Helicopter, dynamic stall, DLR-TAU, elsA, finite wing
Event Title:AHS 70th Annual Forum and Technology Display
Event Location:Montréal, Québec, Canada
Event Type:international Conference
Event Dates:20. - 22. May 2014
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 Virtual Aerodynamic Rotorcraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Micknaus, Ilka
Deposited On:10 Jun 2014 16:53
Last Modified:17 Feb 2015 14:22

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