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Analysis of Configurational Parameters on the Vortex System of a Rotor

Heintz, Alexander and Schwarz, Clemens and Wolf, C. Christian and Raffel, Markus (2023) Analysis of Configurational Parameters on the Vortex System of a Rotor. In: 21. STAB-Workshop - Jahresbericht 2023, pp. 50-51. 21. STAB - Workshop 2023, 2023-11-07 - 2023-11-08, Göttingen, Deutschland.

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Official URL: https://www.dlr.de/as/Portaldata/5/Resources/dokumente/veranstaltungen/stab_workshop/Jahresbericht2023.pdf


The wake of a rotor is a complex three-dimensional flow, which is dominated by unsteady aerodynamic effects. In general, the wake is characterized by the helix-shaped trailing blade tip vortices, the blade shear layers, the rotorinduced downwash velocity field and the external flow conditions. The interaction of these mechanisms results in the breakdown of the vortex system with its downward propagation. The blade tip vortices, which are initially well defined, begin to decompose with increasing wake age. Due to its complexity, the numerical simulation of this breakdown is still challenging and therefore part of current research activities. The vortex interaction and decomposition are highly relevant to the efficiency and noise development of rotors, especially for hover flight cases. Accordingly, these effects need to be investigated in detail. In recent publications additional s-shaped vortex worms, in between the blade tip vortices, were observed. A so formed vortex system is sketched in Fig. 1a. This presentation will also focus on their contribution to vortex breakdown.

Item URL in elib:https://elib.dlr.de/199221/
Document Type:Conference or Workshop Item (Speech)
Title:Analysis of Configurational Parameters on the Vortex System of a Rotor
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Wolf, C. ChristianUNSPECIFIEDhttps://orcid.org/0000-0002-9052-7548UNSPECIFIED
Raffel, MarkusUNSPECIFIEDhttps://orcid.org/0000-0002-3340-9115148184027
Date:7 November 2023
Journal or Publication Title:21. STAB-Workshop - Jahresbericht 2023
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 50-51
EditorsEmailEditor's ORCID iDORCID Put Code
Series Name:Jahresbericht
Keywords:aerodynamics, helicopter, PIV, helicopter wake, vortex decay, secondary vortices, vortex interaction, hover
Event Title:21. STAB - Workshop 2023
Event Location:Göttingen, Deutschland
Event Type:Workshop
Event Start Date:7 November 2023
Event End Date:8 November 2023
Organizer:DLR, STAB
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Rotorcraft and Validation
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Koch, Bianca
Deposited On:06 Dec 2023 14:22
Last Modified:24 Apr 2024 20:59

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