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Blade Tip-Vortices of a Four-Bladed Rotor with Axial Inflow

Goerttler, Andreas and Braukmann, Johannes N. and Wolf, C. Christian and Gardner, Anthony D. and Raffel, Markus (2019) Blade Tip-Vortices of a Four-Bladed Rotor with Axial Inflow. In: Proceedings of the 75th Annual Forum and Technology Display, pp. 1-13. VFS 75th Annual Forum & Technology Display, 13.-16. Mai 2019, Philadelphia, PA, USA.

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Abstract

The vortex system of four rotating and pitching DSA-9A blades was examined numerically and experimentally. Numerical computations were performed using DLR's finite-volume solver TAU and were validated against experimental data gathered using particle image velocimetry (PIV) carried out at the rotor test facility in Gottingen (RTG). Algorithms deriving the vortex position, swirl velocity, circulation and core radius were implemented. Hover-like conditions with a fixed blade pitch were analyzed giving a good picture of the static vortex system. These results are used to understand the vortex development for the unsteady pitching conditions, which can be described as a superpositioning of static vortex states. The use of a zonal DES approach reduced numerical dissipation and improved physical modelling of the vortex development.

Item URL in elib:https://elib.dlr.de/122533/
Document Type:Conference or Workshop Item (Speech)
Title:Blade Tip-Vortices of a Four-Bladed Rotor with Axial Inflow
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Goerttler, Andreasandreas.goerttler (at) dlr.deUNSPECIFIED
Braukmann, Johannes N.Johannes.Braukmann (at) dlr.dehttps://orcid.org/0000-0001-8046-9623
Wolf, C. ChristianChristian.Wolf (at) dlr.dehttps://orcid.org/0000-0002-9052-7548
Gardner, Anthony D.anthony.gardner (at) dlr.dehttps://orcid.org/0000-0002-1176-3447
Raffel, Markusmarkus.raffel (at) dlr.dehttps://orcid.org/0000-0002-3340-9115
Date:May 2019
Journal or Publication Title:Proceedings of the 75th Annual Forum and Technology Display
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Page Range:pp. 1-13
Series Name:Conference Proceedings digital
Status:Published
Keywords:Blade Tip Vortex, Helicopter, Rotor, CFD, Experiment
Event Title:VFS 75th Annual Forum & Technology Display
Event Location:Philadelphia, PA, USA
Event Type:international Conference
Event Dates:13.-16. Mai 2019
Organizer:AHS - The Vertical Flight Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Winkels, Elisabeth
Deposited On:12 Jun 2019 11:07
Last Modified:19 Sep 2019 13:31

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