Willert, Christian und Klinner, Joachim (2014) High-Speed Particle Image Velocimetry for the Efficient Measurement of Turbulence Statistics. Diagnostik i.d. Verbrennung, DIV10, 2014-10-15 - 2014-10-16, Stuttgart.
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Kurzfassung
A high frame rate camera and a continuous wave laser are used to capture long particle image sequences exceeding 100,000 consecutive frames at framing frequencies up to 50 kHz. The combination of large image number and high frame rate is possible by restricting the field of view to a narrow strip of 256 pixel width and 1024 pixel height. The electronic shutter of the high-speed CMOS camera is reduced to 10us to prevent excessive particle image streaking. Multi-frame PIV processing algorithms are employed to improve the dynamic range of recovered PIV data. The large number of velocity data permits a reliable estimation of both the mean velocity profile down to a few wall units as well as statistical information such as the near wall Reynolds stress components. The measurement technique is demonstrated on a turbulent channel flow inside a small wind tunnel with Re_delta = 4800 and Re_tau = 240. The continuous velocity data can further be used to extract frequency spectra and probability density functions of the boundary layer flow.
elib-URL des Eintrags: | https://elib.dlr.de/94591/ | ||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||
Titel: | High-Speed Particle Image Velocimetry for the Efficient Measurement of Turbulence Statistics | ||||||||||||
Autoren: |
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Datum: | Oktober 2014 | ||||||||||||
Referierte Publikation: | Nein | ||||||||||||
Open Access: | Nein | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Nein | ||||||||||||
In ISI Web of Science: | Nein | ||||||||||||
Status: | veröffentlicht | ||||||||||||
Stichwörter: | particle image velocimetry, PIV, turbulence statistics, turbulent boundary layer, wall bounded flows, high speed camera, channel flow, PIV processing algorithm, time-resolved PIV | ||||||||||||
Veranstaltungstitel: | Diagnostik i.d. Verbrennung, DIV10 | ||||||||||||
Veranstaltungsort: | Stuttgart | ||||||||||||
Veranstaltungsart: | Workshop | ||||||||||||
Veranstaltungsbeginn: | 15 Oktober 2014 | ||||||||||||
Veranstaltungsende: | 16 Oktober 2014 | ||||||||||||
Veranstalter : | DLR, Inst. f. Verbrennungstechnik | ||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||
HGF - Programmthema: | Antriebssysteme | ||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||
DLR - Forschungsgebiet: | L ER - Engine Research | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Virtuelles Triebwerk und Validierungsmethoden (alt) | ||||||||||||
Standort: | Köln-Porz | ||||||||||||
Institute & Einrichtungen: | Institut für Antriebstechnik > Triebwerksmesstechnik | ||||||||||||
Hinterlegt von: | Willert, Dr.phil. Christian | ||||||||||||
Hinterlegt am: | 15 Jan 2015 15:46 | ||||||||||||
Letzte Änderung: | 24 Apr 2024 20:00 |
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