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Dynamic Stall Computations of Double-Swept Rotor Blades (Vollbeitrag)

Kaufmann, Kurt and Müller, Martin Michael and Gardner, Anthony (2020) Dynamic Stall Computations of Double-Swept Rotor Blades (Vollbeitrag). In: 21st STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics, 142, pp. 351-361. Springer Nature. 21. STAB/DGLR Symposium 2018, 6.-7. Nov. 2018, Darmstadt. doi: 10.1007/978-3-030-25253-3_34. ISBN 978-3-030-25252-6. ISSN 1612-2909.

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Official URL: https://doi.org/10.1007/978-3-030-25253-3_34

Abstract

A new design of a Mach-scaled double-swept rotor configuration is investigated by means of unsteady Reynolds-averaged Navier-Stokes computations using the DLR-TAU Code. The investigated rotor frequency of 23.6 Hz results in a Reynolds number of 350,000 and a Mach number of 0.21 at 75% radius. Two highly resolved dynamic stall cases with a sinusoidal pitching are considered and the results are compared to similar numerical computations using a parabolic blade-tip. The flow generated by the double-swept rotor configuration first stalls in the vicinity of the blade-tip, whereas for the parabolic blade-tip the stall process starts further inboard. In addition, the flow field of the double-swept rotor can be separated into two parts: outboard and inboard of the double-swept region. The lift inboard at r/R = 0.70 starts to stall at Theta_root = 32.9° and is delayed compared to the outboard region at r/R = 0.90, where lift stall occurs at Theta_root = 30.9°.

Item URL in elib:https://elib.dlr.de/120749/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Print ISBN 978-3-030-25252-6 Online ISBN 978-3-030-25253-3 ISSN-electronic 1860-0824
Title:Dynamic Stall Computations of Double-Swept Rotor Blades (Vollbeitrag)
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kaufmann, KurtKurt.Kaufmann (at) dlr.dehttps://orcid.org/0000-0003-2276-3386
Müller, Martin MichaelM-MMueller (at) dlr.deUNSPECIFIED
Gardner, Anthonyanthony.gardner (at) dlr.dehttps://orcid.org/0000-0002-1176-3447
Date:2020
Journal or Publication Title:21st STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:142
DOI :10.1007/978-3-030-25253-3_34
Page Range:pp. 351-361
Editors:
EditorsEmailEditor's ORCID iD
Dillmann, Andreasandreas.dillmann@dlr.deUNSPECIFIED
Heller, GerdAirbus BremenUNSPECIFIED
Krämer, EwaldInstitut für Aerodynamik und Gasdynamik Universität StuttgartUNSPECIFIED
Wagner, ClausClaus.Wagner@DLR.deUNSPECIFIED
Tropea, CameronFachgebiet Strömungslehre und Aerodynamik, TU DarmstadtUNSPECIFIED
Jakirlic, SuadTU DarmstadtUNSPECIFIED
Publisher:Springer Nature
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-030-25252-6
Status:Published
Keywords:CFD, dynamic stall, helicopter aerodynamics
Event Title:21. STAB/DGLR Symposium 2018
Event Location:Darmstadt
Event Type:international Conference
Event Dates:6.-7. Nov. 2018
Organizer:STAB/DGLR
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
Institute of Aeroelasticity > Aeroelastic Experiments
Deposited By: Winkels, Elisabeth
Deposited On:15 Nov 2018 11:59
Last Modified:18 Jun 2020 09:38

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