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Design of a Rotor Blade Tip for the Investigation of Dynamic Stall in the Transonic Wind-Tunnel Göttingen

Lütke, Benjamin and Nuhn, Johannes and Govers, Yves and Schmidt, Moritz (2016) Design of a Rotor Blade Tip for the Investigation of Dynamic Stall in the Transonic Wind-Tunnel Göttingen. The Aeronautical Journal, 120 (1232), pp. 1509-1533. Cambridge University Press. doi: 10.1017/aer.2016.74. ISSN 0001-9240.

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Official URL: https://www.cambridge.org/core/journals/aeronautical-journal/article/design-of-a-rotor-blade-tip-for-the-investigation-of-dynamic-stall-in-the-transonic-wind-tunnel-gottingen/DC875AABFD6FA84420B87204B7BBFB9E


The aerodynamic and structural design of a pitching blade tip with a double-swept planform is presented. The authors demonstrate how high-fidelity finite element (FE) and computational fluid dynamic (CFD) simulations are successfully used in the design phase. Eigenfrequencies, deformation, and stress distributions are evaluated by means of a three-dimensional (3D) FE model. Unsteady Reynolds-averaged Navier-Stokes (RANS) simulations are compared to experimental data for a light dynamic stall case at Ma = 0.5, Re = 1.2 × 106. The results show a very good agreement as long as the flow stays attached. Tendencies for the spanwise location of separation are captured. As soon as separation sets in, discrepancies between experimental and numerical data are observed. The experimental data show that for light dynamic stall cases at Ma = 0.5, a factor of safety of FoS = 2.0 is sufficient if the presented simulation methods are used.

Item URL in elib:https://elib.dlr.de/106212/
Document Type:Article
Title:Design of a Rotor Blade Tip for the Investigation of Dynamic Stall in the Transonic Wind-Tunnel Göttingen
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lütke, Benjaminbenjamin.luetke (at) dlr.deUNSPECIFIED
Nuhn, Johannesjohannes.nuhn (at) dlr.deUNSPECIFIED
Govers, Yvesyves.govers (at) dlr.deUNSPECIFIED
Schmidt, Moritzmoritz.schmidt (at) dlr.deUNSPECIFIED
Date:October 2016
Journal or Publication Title:The Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1017/aer.2016.74
Page Range:pp. 1509-1533
Publisher:Cambridge University Press
Keywords:Structural and aerodynamic design; dynamic stall; helicopter; double-swept rotor blade tip; transonic wind-tunnel; experiment; CFD; FEM
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 - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Experiments
Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Mai, Holger
Deposited On:28 Nov 2016 15:41
Last Modified:29 Nov 2016 14:06

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