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Wall pressure spectra on a DU96-W-180 profile from low to pre-stall angles of attack

Suryadi, Alexandre und Herr, Michaela (2015) Wall pressure spectra on a DU96-W-180 profile from low to pre-stall angles of attack. In: 21st AIAA/CEAS Aeroacoustics Conference, 2015. 21st AIAA/CEAS Aeroacoustics Conference, 2015-06-22 - 2015-06-26, Dallas, Texas. doi: 10.2514/6.2015-2688.

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Kurzfassung

In an effort to characterize noise induced by separated turbulent boundary layers, surface pressure fluctuations on a DU96-W-180 airfoil were measured using miniature pressure sensors. Because of limitation in amplifier channels and available sensors, a rearrangeable configuration of sensors was applied. Chordwise distributions of the surface pressure were obtained for aerodynamic angles of attack of $-0.8^\circ\leq\alpha\leq10.3^\circ$ and at three Reynolds numbers $(0.8, 1.0, and 1.2) \times 10^6$. The boundary layer profile at 1%c behind the trailing edge was measured using constant temperature anemometry. The boundary layer thickness compares well with that simulated using XFOIL for $alpha\leq7.8^\circ�$. Within the limits of the simulation, other relevant boundary layer properties from XFOIL were used to calculate the surface pressure spectrum predicted from published empirical models for zero and non-zero pressure gradient turbulent boundary layers. Finally, a modified Blake-TNO semi-empirical model was used to predict the surface pressure spectrum near the trailing edge for separated flow. The modification is introduced to the so called `moving axis spectrum' and the chord-normal correlation length scale. It is found that in the low frequency range, the modified semi-empirical model �fits well with the measured surface pressure spectrum of a separated turbulent boundary layer.

elib-URL des Eintrags:https://elib.dlr.de/97164/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Wall pressure spectra on a DU96-W-180 profile from low to pre-stall angles of attack
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Suryadi, AlexandreAlexandre.Suryadi (at) dlr.dehttps://orcid.org/0000-0002-5129-5510NICHT SPEZIFIZIERT
Herr, Michaelamichaela.herr (at) dlr.dehttps://orcid.org/0009-0000-7275-7078NICHT SPEZIFIZIERT
Datum:23 Juni 2015
Erschienen in:21st AIAA/CEAS Aeroacoustics Conference, 2015
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
DOI:10.2514/6.2015-2688
Status:veröffentlicht
Stichwörter:measurements, wall pressure spectra, wind energy, separated flow, flow modeling
Veranstaltungstitel:21st AIAA/CEAS Aeroacoustics Conference
Veranstaltungsort:Dallas, Texas
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:22 Juni 2015
Veranstaltungsende:26 Juni 2015
Veranstalter :AIAA
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:keine Zuordnung
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Windenergie (alt), L - Simulation und Validierung (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Technische Akustik
Hinterlegt von: Suryadi, Alexandre
Hinterlegt am:20 Jul 2015 16:09
Letzte Änderung:24 Apr 2024 20:02

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