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Influence of some recording parameters on digital holography particle image velocimetry

Zhang, Yonggang and Shen, Gongxin and Schröder, Andreas and Kompenhans, Jürgen (2005) Influence of some recording parameters on digital holography particle image velocimetry. Optical Engineering, Vol. 45 (7), 075801-1-075801-10. Spie - The Journal of The International Society for Optical Engineering. DOI: 10.1117/1.2227074.

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Abstract

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.

Document Type:Article
Additional Information:published online: July 20, 2006
Title:Influence of some recording parameters on digital holography particle image velocimetry
Authors:
AuthorsInstitution or Email of Authors
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, AndreasUNSPECIFIED
Kompenhans, JürgenUNSPECIFIED
Date:2005
Journal or Publication Title:Optical Engineering
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:Vol. 45
DOI:10.1117/1.2227074
Page Range:075801-1-075801-10
Publisher:Spie - The Journal of The International Society for Optical Engineering
Series Name:Holography
Status:Published
Keywords:digital holography, in-line holography, particle image velocimetry
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Air Traffic and Weather (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:30 Oct 2006
Last Modified:14 Jan 2010 20:24

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