elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Dynamic Stall Investigation on a Rotating semi-elastic Double-swept Rotor Blade at the Rotor Test Facility Gottingen

Müller, Martin Michael and Weiss, Armin and Braukmann, Johannes N. (2022) Dynamic Stall Investigation on a Rotating semi-elastic Double-swept Rotor Blade at the Rotor Test Facility Gottingen. In: 78th Annual Vertical Flight Society Forum and Technology Display, FORUM 2022. Vertical Flight Society. Vertical Flight Society 78th Forum, 10.-12. Mai 2022, Fort Worth, USA. doi: 10.4050/F-0078-2022-17634. ISBN 978-171385426-5.

[img] PDF
9MB

Official URL: https://vtol.org/annual-forum/forum-78-proceedings

Abstract

Experimental investigations of three-dimensional dynamic stall on a four-bladed Mach-scaled semi-elastic rotor with an innovative double-swept rotor blade planform are presented. The study focuses on the coupling between the aeroelastic behavior of the blade and the underlying aerodynamics. Blade bending moment and flap displacement measurements were conducted using strain gauges and optical tracking of blade tip markers. The aerodynamic behavior was characterized by means of unsteady surface pressure measurements using unsteady pressure-sensitive paint (iPSP) across the outer 65 % of the blade span and fast response pressure transducers at discrete locations. Different cyclicpitch settings were investigated at a rotation frequency of frotor = 23.6 Hz, that corresponds to blade tip Mach and Reynolds numbers of Mtip = 0.282 - 0.285 and Retip = 5.84 - 5.95 x 105. The findings reveal a detailed insight into the non-linear behavior in the flap movement during downstroke. iPSP and pressure transducer data indicates that this non-linear flap behavior is caused by a radially phase-shifted dynamic stall process at the forward and backward swept part of the blade.

Item URL in elib:https://elib.dlr.de/187668/
Document Type:Conference or Workshop Item (Speech)
Title:Dynamic Stall Investigation on a Rotating semi-elastic Double-swept Rotor Blade at the Rotor Test Facility Gottingen
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Müller, Martin MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Weiss, ArminUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Braukmann, Johannes N.UNSPECIFIEDhttps://orcid.org/0000-0001-8046-9623UNSPECIFIED
Date:13 May 2022
Journal or Publication Title:78th Annual Vertical Flight Society Forum and Technology Display, FORUM 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI:10.4050/F-0078-2022-17634
Publisher:Vertical Flight Society
ISBN:978-171385426-5
Status:Published
Keywords:Aeromechanic, Double-Swept, Rotor, iPSP
Event Title:Vertical Flight Society 78th Forum
Event Location:Fort Worth, USA
Event Type:international Conference
Event Dates:10.-12. Mai 2022
Organizer:Vertical Flight Society
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 of Aeroelasticity > Aeroelastic Experiments
Institute for Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Müller, Martin Michael
Deposited On:22 Aug 2022 14:23
Last Modified:26 Jul 2023 14:43

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.