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Efficient Profile Sensor based on High-Speed PIV

Willert, Christian (2013) Efficient Profile Sensor based on High-Speed PIV. AFDAR Workshop on TOMO-PIV and Time-Resolved-PIV, 30. Jun. 2013, Delft, The Netherlands.

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[img] Video (AVI) (Visualization of velocity and vorticity in turbulent boundary layer) - Registered users only


A high frame rate camera and a continuous wave laser are used to capture long particle image sequences exceeding 30,000 consecutive frames at framing frequencies up to 20 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 20us 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 = 4300 and Re_tau = 220. The continuous velocity data can further be used to extract frequency spectra and probability density functions of the boundary layer flow.

Item URL in elib:https://elib.dlr.de/83980/
Document Type:Conference or Workshop Item (Speech)
Title:Efficient Profile Sensor based on High-Speed PIV
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Willert, Christianchris.willert (at) dlr.deUNSPECIFIED
Date:30 June 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Series Name:EU-AFDAR Workshop Proceedings
Keywords:particle image velocimetry, PIV, turbulence statistics, turbulent boundary layer, high speed camera, channel flow, PIV processing algorithm, time-resolved PIV
Event Title:AFDAR Workshop on TOMO-PIV and Time-Resolved-PIV
Event Location:Delft, The Netherlands
Event Type:Workshop
Event Dates:30. Jun. 2013
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Willert, Dr.phil. Christian
Deposited On:30 Aug 2013 10:10
Last Modified:08 May 2014 23:18

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