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Review of measurement techniques for unsteady helicopter rotor flows

Gardner, Anthony D. and Wolf, C. Christian and Raffel, Markus (2019) Review of measurement techniques for unsteady helicopter rotor flows. Progress in Aerospace Sciences, 111, pp. 1-17. Elsevier. doi: 10.1016/j.paerosci.2019.100566. ISSN 0376-0421.

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Official URL: https://doi.org/10.1016/j.paerosci.2019.100566


The helicopter group at the DLR in Göttingen has been actively involved in the development of measurement techniques for unsteady flows, particularly as they apply to the problems found in unsteady rotor blade aerodynamics. This includes the development and validation of new techniques for the detection of dynamically moving boundary layer transition, and for the detection of dynamic stall and other transient flow separation events. These new techniques include pressure sensor analysis, differential infrared thermography, local infrared thermography and the automated analysis of hot-film data. Particle image velocimetry (PIV) and background oriented schlieren (BOS) have been used for the analysis of the unsteady off-body flow, and synchronised PIVBOS-pressure measurements have allowed direct comparisons between different methods. The Lagrangian volumetric PIV variant, shake-the-box, has been used to analyse secondary vortex structures in the vortex wake. This review article will give an overview of the advances in that group, as well as placing their activities in the context of international advances in these areas.

Item URL in elib:https://elib.dlr.de/129018/
Document Type:Article
Title:Review of measurement techniques for unsteady helicopter rotor flows
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Gardner, Anthony D.UNSPECIFIEDhttps://orcid.org/0000-0002-1176-3447UNSPECIFIED
Wolf, C. ChristianUNSPECIFIEDhttps://orcid.org/0000-0002-9052-7548UNSPECIFIED
Raffel, MarkusUNSPECIFIEDhttps://orcid.org/0000-0002-3340-9115133716079
Date:November 2019
Journal or Publication Title:Progress in Aerospace Sciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-17
EditorsEmailEditor's ORCID iDORCID Put Code
Keywords:Unsteady flow, Measurement techniques, Helicopter rotors, Pressure transducer, PSP, Boundary layer transition, Hot-film anemometry, TSP, DIT, IR thermography, Dynamic stall, PIV, BOS, Vortex
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 (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Winkels, Elisabeth
Deposited On:17 Sep 2019 17:21
Last Modified:31 Oct 2023 13:35

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