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Lößle, Felix and Kostek, Anna and Schmid, Rainer (2021) Experimental Measurement of a UAV Rotor's Acoustic Emission. In: 22nd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics XIII, 151, pp. 387-396. Springer Nature. 22. STAB/DGLR Symposium 2020, 2020-07-15, Göttingen, Deutschland. doi: 10.1007/978-3-030-79561-0_37. ISBN 978-3-030-79560-3. ISSN 1612-2909.
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Official URL: https://link.springer.com/book/10.1007/978-3-030-79561-0#editorsandaffiliations
Abstract
Besides aerodynamic performance, most unmanned aerial vehicles (UAVs) are limited by noise emission in their range of application. Especially in urban areas, the acceptance of UAV noise emission by the affected population is required. Therefore, one objective of DLR’s project URBAN RESCUE is to investigate the noise emission and noise generation mechanisms of small rotors. In order to study noise emission, a test setup was established in DLR’s 1m wind tunnel. For different flight modes, acoustic measurements were conducted using a microphone array. For all test cases the noise emission of the rotor’s blade passing frequency (BPF) is higher in front of the rotor (upstream) than behind it. Due to higher relative velocities on the advancing side than on the retreating side, emission is asymmetric with respect to the flow direction. Additionally, a time-resolved background-oriented schlieren (BOS) setup was used to visualize tip vortices and study noise generation mechanisms.
| Item URL in elib: | https://elib.dlr.de/136456/ | ||||||||||||||||||||
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| Document Type: | Conference or Workshop Item (Other) | ||||||||||||||||||||
| Additional Information: | Hardcover ISBN 978-3-030-79560-3 Softcover ISBN 978-3-030-79563-4 eBook ISBN 978-3-030-79561-0 Series ISSN 1612-2909 Series E-ISSN 1860-0824 | ||||||||||||||||||||
| Title: | Experimental Measurement of a UAV Rotor's Acoustic Emission | ||||||||||||||||||||
| Authors: |
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| Date: | 14 July 2021 | ||||||||||||||||||||
| Journal or Publication Title: | 22nd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics XIII | ||||||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||||||
| Open Access: | Yes | ||||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||||||
| Volume: | 151 | ||||||||||||||||||||
| DOI: | 10.1007/978-3-030-79561-0_37 | ||||||||||||||||||||
| Page Range: | pp. 387-396 | ||||||||||||||||||||
| Editors: |
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| Publisher: | Springer Nature | ||||||||||||||||||||
| Series Name: | Notes on Numerical Fluid Mechanics and Multidisciplinary Design | ||||||||||||||||||||
| ISSN: | 1612-2909 | ||||||||||||||||||||
| ISBN: | 978-3-030-79560-3 | ||||||||||||||||||||
| Status: | Published | ||||||||||||||||||||
| Keywords: | UAV, unmanned aerial vehicle, noise emission, small rotors, acoustic measurements, Ffowcs-Williams/Hawkings-equation, blade element theory | ||||||||||||||||||||
| Event Title: | 22. STAB/DGLR Symposium 2020 | ||||||||||||||||||||
| Event Location: | Göttingen, Deutschland | ||||||||||||||||||||
| Event Type: | national Conference | ||||||||||||||||||||
| Event Date: | 15 July 2020 | ||||||||||||||||||||
| 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 | ||||||||||||||||||||
| Deposited By: | Carter, Beatrice | ||||||||||||||||||||
| Deposited On: | 08 Dec 2020 23:00 | ||||||||||||||||||||
| Last Modified: | 18 Feb 2025 09:37 |
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