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Influence of some recording parameters on digital holography particle image velocimetry

Zhang, Yonggang und Shen, Gongxin und Schröder, Andreas und Kompenhans, Jürgen (2005) Influence of some recording parameters on digital holography particle image velocimetry. Optical Engineering, Vol. 45 (7), . Spie - The Journal of The International Society for Optical Engineering. DOI: 10.1117/1.2227074.

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Kurzfassung

Digital holographic particle image velocimetry (DHPIV) is a promising technique for the measurement of the instantaneous flow velocity within a volume of the flow. Besides problems at illumination and recording which need to be solved, one major issue is, is how to extract the information about the location of the particles within the flow and their displacement between two illuminations out of the storage medium, i.e. the digital hologram. Some recording parameters such as the recording distance z<sub>0</sub>, particle size d<sub>p</sub>, wavelength λ, the size of the CCD chip H, the pixel size d<sub>pixel</sub> and the particle concentration c<sub>p</sub> etc, will considerably affect the results of the reconstruction, and may even determine the success or failure of a measurement. This paper discusses the influence of these parameters and presents a formula for the critical recording distance. The numerical simulations indicate that when the recording distance is near to the critical recording distance, the results of the reconstruction are much better than those obtained far away from the critical recording distance, especially for high particle concentration. Also an experiment is made to validate the corresponding analysis.

Dokumentart:Zeitschriftenbeitrag
Zusätzliche Informationen:published online: July 20, 2006
Titel:Influence of some recording parameters on digital holography particle image velocimetry
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Zhang, YonggangBeijing University of Aeronautics and Astronautics, Institute of Fluid Mechanics, China
Shen, GongxinBeijing University of Aeronautics and Astronautics, Institute of Fluid Mechanics, China
Schröder, AndreasNICHT SPEZIFIZIERT
Kompenhans, JürgenNICHT SPEZIFIZIERT
Datum:2005
Erschienen in:Optical Engineering
Referierte Publikation:Ja
In ISI Web of Science:Ja
Band:Vol. 45
DOI :10.1117/1.2227074
Seitenbereich:
Verlag:Spie - The Journal of The International Society for Optical Engineering
Name der Reihe:Holography
Status:veröffentlicht
Stichwörter:digital holography, in-line holography, particle image velocimetry
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:L VU - Luftverkehr und Umwelt (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Luftverkehr und Wetter (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren
Hinterlegt von: Ilka Micknaus
Hinterlegt am:30 Okt 2006
Letzte Änderung:14 Jan 2010 20:24

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