NDLI: Self-synchronizing schlieren photography and interferometry for the visualization of unsteady transonic flows

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Self-synchronizing schlieren photography and interferometry for the visualization of unsteady transonic flows

Content Provider	NASA Technical Reports Server (NTRS)
Author	Kadlec, R.
Copyright Year	1979
Description	The use of self synchronizing stroboscopic Schlieren and laser interferometer systems to obtain quantitative space time measurements of distinguished flow surfaces, steakline patterns, and the density field of two dimensional flows that exhibit a periodic content was investigated. A large field single path stroboscopic Schlieren system was designed, constructed and successfully applied to visualize four periodic flows: near wake behind an oscillating airfoil; edge tone sound generation; 2-D planar wall jet; and axisymmetric pulsed sonic jet. This visualization technique provides an effective means of studying quasi-periodic flows in real time. The image on the viewing screen is a spatial signal average of the coherent periodic motion rather than a single realization, the high speed motion of a quasi-periodic flow can be reconstructed by recording photographs of the flow at different fixed time delays in one cycle. The preliminary design and construction of a self synchronizing stroboscopic laser interferometer with a modified Mach-Zehnder optical system is also reported.
File Size	3725593
Page Count	31
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19810023929
Archival Resource Key	ark:/13960/t16m8255n
Language	English
Publisher Date	1979-03-12
Access Restriction	Open
Subject Keyword	Transonic Flow Signal To Noise Ratios Laser Interferometry Synchronism Flow Visualization Unsteady Flow Two Dimensional Flow Periodic Variations Schlieren Photography Stroboscopes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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