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Experimental Measurement Techniques for Full-Scale Helicopters

Wolf, Christian and Schwarz, Clemens and Braukmann, Johannes N. and Gardner, Anthony and Raffel, Markus (2021) Experimental Measurement Techniques for Full-Scale Helicopters. In: 20. STAB-Workshop - Jahresbericht 2021, pp. 75-76. 20. STAB-Workshop 2021, 16.-17.11.2021, Göttingen, Deutschland.

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Official URL: https://www.dlr.de/as/Portaldata/5/Resources/dokumente/veranstaltungen/stab_workshop/STAB-Jahresbericht-2021.pdf

Abstract

The wake of its main rotor plays a key role in the overall performance and operational safety of a helicopter. The flow is governed by complex and unsteady features, such as the blade shear layers and blade tip vortices. In recent years, experimental measurement techniques have been developed and refined for this application, to keep up with an increasing level of detail in numerical simulations, and to provide reference validation data. In particular, the talk will address "out-of-the-lab" problems encountered during fullscale helicopter tests in an airfield environment. This includes long viewing distances combined with a limited sensitivity and resolution for optical camera systems, wind and temperature influence, short measurement intervals and inferior reproducibility, limited access to the sensors etc. It will also be shown how a careful selection and time-synchronous application of multiple measurement techniques can remedy the individual disadvantages, providing a better overall picture of the wake aerodynamics.

Item URL in elib:https://elib.dlr.de/143822/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental Measurement Techniques for Full-Scale Helicopters
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wolf, ChristianChristian.Wolf (at) dlr.dehttps://orcid.org/0000-0002-9052-7548
Schwarz, ClemensClemens.Schwarz (at) dlr.deUNSPECIFIED
Braukmann, Johannes N.Johannes.Braukmann (at) dlr.dehttps://orcid.org/0000-0001-8046-9623
Gardner, Anthonyanthony.gardner (at) dlr.dehttps://orcid.org/0000-0002-1176-3447
Raffel, MarkusMarkus.Raffel (at) dlr.dehttps://orcid.org/0000-0002-3340-9115
Date:16 November 2021
Journal or Publication Title:20. STAB-Workshop - Jahresbericht 2021
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 75-76
Editors:
EditorsEmailEditor's ORCID iD
UNSPECIFIEDSTABUNSPECIFIED
Series Name:Jahresbericht
Status:Published
Keywords:Full scale helicopter measurements, BOS, schlieren, measurement techniques
Event Title:20. STAB-Workshop 2021
Event Location:Göttingen, Deutschland
Event Type:Workshop
Event Dates:16.-17.11.2021
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: Carter, Beatrice
Deposited On:05 Jan 2022 14:35
Last Modified:05 Jan 2022 14:35

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