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Pulsed operation of high power light emitting diodes for flow velocimetry

Willert, Christian and Mößner, Steffen and Klinner, Joachim (2009) Pulsed operation of high power light emitting diodes for flow velocimetry. 8th Internation Symposium on Particle Image Velocimetry (PIV09), 25.-28. Aug. 2009, Melbourne, Australia. (In Press)

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Abstract

High powered light emitting diodes (LED) are investigated for possible uses as light sources in flow diagnostics, in particular, as an alternative to laser-based illumination in particle imaging flow velocimetry. Recent developments in solid state illumination resulted in mass-produced LEDs that provide average radiant power in excess of 10 Watt. By operating these LEDs with short duration, pulsed currents that are considerably beyond their continuous current damage threshold, light pulses can be generated that are sufficient to the illuminate and image micron sized particles in flow velocimetry. Kilohertz frame rate PIV measurements in water are presented. The feasibility of LED-based PIV measurements in air is also demonstrated.

Document Type:Conference or Workshop Item (Speech)
Title:Pulsed operation of high power light emitting diodes for flow velocimetry
Authors:
AuthorsInstitution or Email of Authors
Willert, Christianchris.willert@dlr.de
Mößner, Steffensteffen.moessner@dlr.de
Klinner, Joachimjoachim.klinner@dlr.de
Date:25 August 2009
Refereed publication:Yes
In ISI Web of Science:No
Status:In Press
Keywords:flow diagnostics, image based velocimetry, time-resolved PIV
Event Title:8th Internation Symposium on Particle Image Velocimetry (PIV09)
Event Location:Melbourne, Australia
Event Type:Conference
Event Dates:25.-28. Aug. 2009
Organizer:Monash University
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology
Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Dr.phil. Christian Willert
Deposited On:19 Oct 2009 09:33
Last Modified:12 Dec 2013 20:38

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