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Towards In-Flight Measurements of Helicopter Blade Tip Vortices

Kindler, Kolja and Mulleners, Karen and Raffel, Markus (2013) Towards In-Flight Measurements of Helicopter Blade Tip Vortices. In: Research Topics in Aerospace Advanced In-Flight Measurement Techniques. Springer Verlag, Heidelberg New York Dordrecht London. pp. 171-185. ISBN 978-3-642-34737-5. ISSN 2194-8240.

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Official URL: http://link.springer.com/book/10.1007/978-3-642-34738-2/page/1


In the framework of the AIM project the near field of the blade tip vortex of a full-scale helicopter in simulated hover flight was investigated by combining three-component Particle Image Velocimetry and Background Oriented Schlieren measurements. The velocity field measurements in the range of wake ages of 1° to 30° in azimuth provided a reference for a quantitative analysis of the Schlieren results yielding vortex core density estimates. Ongoing vortex roll-up was observed at 1° while considerable aperiodicity was persistent thereafter. The vortex parameters for vortices older than 1° were consistent with the Scully vortex model. However, the particular challenges of full-scale, outdoor testing, especially the limited spatial resolution and aperiodicity effects, yielded a higher level of measurement uncertainty as compared to sub-scale experiments.

Item URL in elib:https://elib.dlr.de/66496/
Document Type:Contribution to a Collection
Additional Information:eBook: 978-3-642-34738-2, eISSN: 2194-8259, DOI: 10.1007/978-3-642-34738-2_11, Chapter 11
Title:Towards In-Flight Measurements of Helicopter Blade Tip Vortices
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Mulleners, KarenLeibniz Universität HannoverUNSPECIFIED
Raffel, Markusmarkus.raffel (at) dlr.deUNSPECIFIED
Journal or Publication Title:Research Topics in Aerospace
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 171-185
EditorsEmailEditor's ORCID iD
Lawson, NickolasCranfield University, National Flying Laboratory Centre, Beds, UKUNSPECIFIED
Jentink, Henk, W.NLR, Amsterdam, The NetherlandsUNSPECIFIED
Kompenhans, JürgenDLRUNSPECIFIED
Publisher:Springer Verlag, Heidelberg New York Dordrecht London
Series Name:Advanced In-Flight Measurement Techniques
Keywords:blade tip vortices, full-scale testing, PIV, BOS
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 , Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Mulleners, Karen
Deposited On:08 May 2013 14:33
Last Modified:31 Jul 2019 19:29

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