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

Willert, Christian und Stasicki, Boleslaw und Moessner, Steffen und Freitag, Stefan und Klinner, Joachim und Soria, Julio und Mitchell, Daniel und 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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Kurzfassung

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.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Application of pulsed high-power LEDs for high speed visualization and measurement of flows
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Willert, Christianchris.willert@dlr.de
Stasicki, Boleslawboleslaw.stasicki@dlr.de
Moessner, SteffenNICHT SPEZIFIZIERT
Freitag, Stefanstefan.freitag@dlr.de
Klinner, Joachimjoachim.klinner@dlr.de
Soria, JulioMonash University
Mitchell, DanielMonash University
Buchmann, NicolasMonash University
Datum:2010
Status:veröffentlicht
Stichwörter:pulsed LED light, illuminator, high-speed imaging, flow velocimetry, PIV, particle image velocimetry, Schlieren imaging
Veranstaltungstitel:Measurement and Optical Techniques for Aerospace Research (MOTAR)
Veranstaltungsort:Saint Louis, France
Veranstaltungsart:Workshop
Veranstaltungsdatum:29.-30. Mar. 2010
Veranstalter :Institut Saint Louis (ISL)
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Antriebe, Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ER - Antriebsforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Virtuelles Triebwerk und Validierungsmethoden
Standort: Köln-Porz , Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren
Institut für Antriebstechnik > Triebwerksmesstechnik
Hinterlegt von: Dr.phil. Christian Willert
Hinterlegt am:02 Aug 2010 13:52
Letzte Änderung:02 Aug 2010 13:52

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