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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

Abstract

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
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gardner, Anthony D.anthony.gardner (at) dlr.dehttps://orcid.org/0000-0002-1176-3447
Wolf, C. ChristianChristian.Wolf (at) dlr.dehttps://orcid.org/0000-0002-9052-7548
Raffel, MarkusMarkus.Raffel (at) dlr.dehttps://orcid.org/0000-0002-3340-9115
Date:November 2019
Journal or Publication Title:Progress in Aerospace Sciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:111
DOI :10.1016/j.paerosci.2019.100566
Page Range:pp. 1-17
Editors:
EditorsEmailEditor's ORCID iD
UNSPECIFIEDElsevierUNSPECIFIED
Publisher:Elsevier
ISSN:0376-0421
Status:Published
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
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:06 Aug 2020 10:58

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