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High power LEDs in imaging flow diagnostics: Current status and future prospects

Willert, Christian and Stasicki, Boleslaw and Kompenhans, Jürgen (2010) High power LEDs in imaging flow diagnostics: Current status and future prospects. EWA Trade Association PIV Steering Group Meeting, 08. Jul. 2010, Lisbon, Portugal.

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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 newly designed pulsed LED-illuminators based on recently introduced high power LEDs which can be used for high-speed videography, Particle Image Velocimetry (PIV), Image Pattern Correlation Technique (IPCT), and Background Oriented Schlieren (BOS). Current developments suggest that LED devices with even higher light emission will be available in the future thereby further expanding the range of possible applications of LEDs in scientific imaging diagnostics.

Document Type:Conference or Workshop Item (Speech)
Title:High power LEDs in imaging flow diagnostics: Current status and future prospects
Authors:
AuthorsInstitution or Email of Authors
Willert, Christianchris.willert@dlr.de
Stasicki, Boleslawboleslaw.stasicki@dlr.de
Kompenhans, Jürgenjürgen.kompenhans@dlr.de
Date:8 July 2010
Refereed publication:No
In ISI Web of Science:No
Status:Published
Keywords:pulsed LED light, illuminator, high-speed imaging, flow velocimetry, PIV, particle image velocimetry, Schlieren imaging
Event Title:EWA Trade Association PIV Steering Group Meeting
Event Location:Lisbon, Portugal
Event Type:Workshop
Event Dates:08. Jul. 2010
Organizer:European Windtunnel Association
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 , 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 14:18
Last Modified:12 Dec 2013 20:59

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