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Investigations of a boxed rotor: The STAR II rotor in DLR's test hall

Wilke, Gunther Andreas and Sugawara, Hideaki and Tanabe, Yasutada and Schneider, Oliver and van der Wall, Berend G. (2023) Investigations of a boxed rotor: The STAR II rotor in DLR's test hall. In: 49th European Rotorcraft Forum (ERF). 49th European Rotorcraft Forum (ERF), 5-7 Sept 2023, Bückeburg, Germany.

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Abstract

The second Smart Twisting Active Rotor (STAR II) project aims at investigating active twist on a conventional blade design in the DNW-LLF wind tunnel. Prior to the wind tunnel test, the rotor is first tested for correct operation in the rotor test hall at the German Aerospace Center (DLR) in Braunschweig. This test shall ensure that all the instrumentation, but also the active twist, works correctly along with setting up the tracking of the blades before shipping the whole test setup to the DNW-LLF wind tunnel. From previous rotor tests in this hall, it was observed that vibration levels increased drastically above certain thrusts. Since there were no PIV tests carried out within this test chamber, it was decided to carry out CFD simulations to obtain visualizations of the flow and to find the origins of these vibrations. The rotor test hall was approximated by a simple box. With the help of CFD simulations carried out by DLR and JAXA, the initial guess of potential recirculation could be confirmed. The recirculation effect and vibrations become stronger with increasing thrust and therefore limits the maximum thrust in the test hall. This paper details the results of the CFD simulation and presents them along with initial experimental data from the rotor test hall.

Item URL in elib:https://elib.dlr.de/197274/
Document Type:Conference or Workshop Item (Speech)
Title:Investigations of a boxed rotor: The STAR II rotor in DLR's test hall
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Wilke, Gunther AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-1915-5307145326462
Sugawara, HideakiUNSPECIFIEDhttps://orcid.org/0000-0002-7905-2481UNSPECIFIED
Tanabe, YasutadaUNSPECIFIEDhttps://orcid.org/0000-0002-3840-9026UNSPECIFIED
Schneider, OliverUNSPECIFIEDhttps://orcid.org/0000-0002-0229-0756UNSPECIFIED
van der Wall, Berend G.UNSPECIFIEDhttps://orcid.org/0000-0001-6144-0921145326464
Date:September 2023
Journal or Publication Title:49th European Rotorcraft Forum (ERF)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:STAR II rotor, rotor in pre-test chamber, hover
Event Title:49th European Rotorcraft Forum (ERF)
Event Location:Bückeburg, Germany
Event Type:international Conference
Event Dates:5-7 Sept 2023
Organizer:DGLR
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: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, BS
Institute of Flight Systems > Rotorcraft
Deposited By: Wilke, Gunther Andreas
Deposited On:26 Oct 2023 11:14
Last Modified:26 Oct 2023 11:14

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