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Aerodynamics of Small Rotors in Hover and Forward Flight

Lößle, Felix and Kostek, Anna and Schwarz, Clemens and Schmid, Rainer and Gardner, Anthony and Raffel, Markus (2022) Aerodynamics of Small Rotors in Hover and Forward Flight. In: 48th European Rotorcraft Forum, ERF 2022, pp. 1-16. 48th European Rotorcraft Forum (ERF 2022), 2022-09-06 - 2022-09-08, Winterthur, Schweiz. ISBN 978-171387029-6.

Full text not available from this repository.

Official URL: https://www.zhaw.ch/de/engineering/institute-zentren/zav/veranstaltungen/erf2022/


A wind tunnel test of eleven two- and three-bladed small-scale rotors was conducted in an open-jet, lowspeed wind tunnel. The goal was to study the influence of number of blades, blade pitch and geometry on the hover performance. Two rotors were also studied in forward flight with varying rotational speeds, rotor tilt angles and flow velocities covering a wide range of operating conditions. The experimental results were used to develop a simple, empirical model of the studied rotor based on dimensionless quantities. The model can be used in the preliminary design of multicopters. The performance measurements were supplemented with optical background-oriented schlieren (BOS) measurements to visualize the blade tip vortices in the rotor wake in order to gain a better understanding of the flow state. Simulations with DLR’s free wake unsteady panel code (UPM) were carried out for comparison.

Item URL in elib:https://elib.dlr.de/187974/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Vortrag mit Paper
Title:Aerodynamics of Small Rotors in Hover and Forward Flight
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Kostek, AnnaUNSPECIFIEDhttps://orcid.org/0009-0005-8582-6278UNSPECIFIED
Gardner, AnthonyUNSPECIFIEDhttps://orcid.org/0000-0002-1176-3447141676332
Raffel, MarkusUNSPECIFIEDhttps://orcid.org/0000-0002-3340-9115133716130
Date:September 2022
Journal or Publication Title:48th European Rotorcraft Forum, ERF 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-16
EditorsEmailEditor's ORCID iDORCID Put Code
Keywords:small-scale rotor, UAV, background-oriented schlieren, tip vortex trajectory, rotor performance, empirical rotor model
Event Title:48th European Rotorcraft Forum (ERF 2022)
Event Location:Winterthur, Schweiz
Event Type:international Conference
Event Start Date:6 September 2022
Event End Date:8 September 2022
Organizer:Centre for Aviation (ZAV)
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:23 Nov 2022 12:12
Last Modified:24 Apr 2024 20:49

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