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Pulsed operation of high-power light emitting diodes for imaging flow velocimetry

Willert, Christian and Stasicki, Boleslaw and Klinner, Joachim and Moessner, S. (2010) Pulsed operation of high-power light emitting diodes for imaging flow velocimetry. Measurement Science and Technology, Vol. 2 (7), pp. 1-12. IOP PUBLISHING. DOI: 10.1088/0957-0233/21/7/075402. ISSN 0957-0233 (Print), 1361-6501 (Online).

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Official URL: http://stacks.iop.org/MST/21/075402

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 in side-scatter imaging arrangements. Recent developments in solid state illumination resulted in mass-produced LEDs that provide average radiant power in excess of 10 W. 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 illuminate and image micron-sized particles in flow velocimetry. Time-resolved PIV measurements in water at a framing rate of 2 kHz are presented. The feasibility of LED-based PIV measurements in air is also demonstrated.

Document Type:Article
Title:Pulsed operation of high-power light emitting diodes for imaging flow velocimetry
Authors:
AuthorsInstitution or Email of Authors
Willert, ChristianUNSPECIFIED
Stasicki, BoleslawUNSPECIFIED
Klinner, JoachimUNSPECIFIED
Moessner, S.UNSPECIFIED
Date:2010
Journal or Publication Title:Measurement Science and Technology
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:Vol. 2
DOI:10.1088/0957-0233/21/7/075402
Page Range:pp. 1-12
Publisher:IOP PUBLISHING
ISSN:0957-0233 (Print), 1361-6501 (Online)
Status:Published
Keywords:particle image velocimetry, PIV, light emitting diode, LED, pulsed light source, time-resolved PIV, flow diagnostics, flow visualization
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: Ilka Micknaus
Deposited On:14 Jun 2010 11:39
Last Modified:12 Dec 2013 20:58

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