Development and characterization of an inexpensive LED-based light source for high-frame-rate schlieren imaging

Lincoln, Daniel; Murari, Kartkik; Johansen, Craig

Development and characterization of an inexpensive LED-based light source for high-frame-rate schlieren imaging

dc.contributor.author	Lincoln, Daniel
dc.contributor.author	Murari, Kartkik
dc.contributor.author	Johansen, Craig
dc.date.accessioned	2016-04-01T21:42:36Z
dc.date.available	2016-04-01T21:42:36Z
dc.date.issued	2015
dc.description.abstract	This work presents characterization results of a 623 nm light emitting diode (LED) based light source developed for low-cost, high frame rate schlieren imaging. The LED was overdriven up to 20 times the rated current while generating 100 ns pulses at a 1 MHz repetition rate. Circuit response, pulse train characteristics, and temperature effects were observed over a large range of input voltages. Relative brightness data was measured with a photodiode and further examined within a schlieren system. Flow visualization of a decaying Mach 3 shock wave were obtained with the system. The wave was produced in a shock tube facility used for aerodynamic measurements. The effect of the light source on image quality, including motion blur are analyzed. Furthermore, shock velocity measurements obtained from the schlieren images are reported.	en_US
dc.description.refereed	Yes	en_US
dc.identifier.doi	10.2514/6.2015-2870
dc.identifier.doi	http://dx.doi.org/10.11575/PRISM/35004
dc.identifier.uri	http://hdl.handle.net/1880/51136
dc.language.iso	en	en_US
dc.publisher	AIAA	en_US
dc.publisher.department	Mechanical and Manufacturing Engineering	en_US
dc.publisher.faculty	Schulich School of Engineering	en_US
dc.publisher.institution	University of Calgary	en_US
dc.title	Development and characterization of an inexpensive LED-based light source for high-frame-rate schlieren imaging	en_US
dc.type	unknown