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Application of pulsed high-power LEDs for high speed visualization and measurement of flows

Willert, Christian and Stasicki, Boleslaw and Moessner, Steffen and Freitag, Stefan and Klinner, Joachim and Soria, Julio and Mitchell, Daniel and Buchmann, Nicolas (2010) Application of pulsed high-power LEDs for high speed visualization and measurement of flows. Measurement and Optical Techniques for Aerospace Research (MOTAR), 29.-30. Mar. 2010, Saint Louis, France.

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Abstract

The rapid progress in the light emitting diode (LED) manufacturing technology nowadays enables the application of high-power LEDs as light sources for both high-speed videography and flow velocimetry. These devices have a number of attractive advantages in comparison to lasers and xenon illumination. Aside from the dramatically reduced cost of procurement, relatively simple operation and considerably longer life time, LEDs are very stable in terms of intensity and their spatial distributions providing incoherent illumination free of speckle artefacts. The presentation describes the use of pulsed hight power LEDs for high-speed Schlieren videography, high speed particle image velocimetry (PIV) as well as tomographic PIV. Pulsed LED illumination is also well suited for surface deformation measurement techniques such as image pattern correlation technique (IPCT) or projected pattern correlation technique (PROPAC). Future developments will result in LED devices with even higher light emission opening a wider range of application in imaging flow diagnostics.

Document Type:Conference or Workshop Item (Speech)
Title:Application of pulsed high-power LEDs for high speed visualization and measurement of flows
Authors:
AuthorsInstitution or Email of Authors
Willert, Christianchris.willert@dlr.de
Stasicki, Boleslawboleslaw.stasicki@dlr.de
Moessner, SteffenUNSPECIFIED
Freitag, Stefanstefan.freitag@dlr.de
Klinner, Joachimjoachim.klinner@dlr.de
Soria, JulioMonash University
Mitchell, DanielMonash University
Buchmann, NicolasMonash University
Date:2010
Status:Published
Keywords:pulsed LED light, illuminator, high-speed imaging, flow velocimetry, PIV, particle image velocimetry, Schlieren imaging
Event Title:Measurement and Optical Techniques for Aerospace Research (MOTAR)
Event Location:Saint Louis, France
Event Type:Workshop
Event Dates:29.-30. Mar. 2010
Organizer:Institut Saint Louis (ISL)
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems, Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods
Location: Köln-Porz , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Dr.phil. Christian Willert
Deposited On:02 Aug 2010 13:52
Last Modified:02 Aug 2010 13:52

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