Coutinho Caldas, Luciano und Meyer, Robert (2023) New method to separate turbulence statistics of fan rotor wakes from background flow. Experiments in Fluids, 64 (2), Seiten 1-17. Springer Nature. doi: 10.1007/s00348-023-03576-0. ISSN 0723-4864.
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Offizielle URL: https://dx.doi.org/10.1007/s00348-023-03576-0
Kurzfassung
The separation of turbulence parameters such as turbulence intensity and integral length scale of fan rotor wakes from background fow from unsteady velocity data is a challenge. The two processes are overlapped, and typically, very few samples of the data are taken inside the rotor wakes, making it hard to perform any spectral analysis. This work proposes a new time domain approach to separate the two processes by using two suitable data tapers. The unsteady velocity cyclic variance distribution is used as reference to establish the border between the blade wakes and the background fow. Results indicate an increase in wake turbulence levels and a slight increase in background turbulence levels with the increase in fan blade loading. The integral length scale of the rotor wakes did not change considerably among the diferent fan loading analyzed. This contrasts with the values observed for the background fow, which decreased with increasing of fan loading. The rotor wakes seem to be anisotropic, regardless of the fan operating point.
elib-URL des Eintrags: | https://elib.dlr.de/198422/ | ||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||
Titel: | New method to separate turbulence statistics of fan rotor wakes from background flow | ||||||||||||
Autoren: |
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Datum: | 24 Januar 2023 | ||||||||||||
Erschienen in: | Experiments in Fluids | ||||||||||||
Referierte Publikation: | Ja | ||||||||||||
Open Access: | Ja | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Ja | ||||||||||||
In ISI Web of Science: | Ja | ||||||||||||
Band: | 64 | ||||||||||||
DOI: | 10.1007/s00348-023-03576-0 | ||||||||||||
Seitenbereich: | Seiten 1-17 | ||||||||||||
Verlag: | Springer Nature | ||||||||||||
ISSN: | 0723-4864 | ||||||||||||
Status: | veröffentlicht | ||||||||||||
Stichwörter: | Hot-wire, Turbulence analyse, Cyclostationary, Rotor wake turbulence analysis, Integral length scale | ||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||
HGF - Programmthema: | Umweltschonender Antrieb | ||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||
DLR - Forschungsgebiet: | L CP - Umweltschonender Antrieb | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Triebwerkskonzepte und -integration | ||||||||||||
Standort: | Berlin-Charlottenburg | ||||||||||||
Institute & Einrichtungen: | Institut für Antriebstechnik > Triebwerksakustik | ||||||||||||
Hinterlegt von: | Caldas, Luciano | ||||||||||||
Hinterlegt am: | 30 Okt 2023 09:44 | ||||||||||||
Letzte Änderung: | 26 Mär 2024 13:18 |
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