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Particle displacement tracking for PIVA new Particle Imaging Velocimetry (PIV) data acquisition and analysis system, which is an order of magnitude faster than any previously proposed system has been constructed and tested. The new Particle Displacement Tracing (PDT) system is an all electronic technique employing a video camera and a large memory buffer frame-grabber board. Using a simple encoding scheme, a time sequence of single exposure images are time coded into a single image and then processed to track particle displacements and determine velocity vectors. Application of the PDT technique to a counter-rotating vortex flow produced over 1100 velocity vectors in 110 seconds when processed on an 80386 PC.
Document ID
19910000958
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Wernet, Mark P. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1990
Subject Category
Instrumentation And Photography
Report/Patent Number
NASA-TM-103288
E-5507-1
NAS 1.15:103288
Accession Number
91N10271
Funding Number(s)
PROJECT: RTOP 505-62-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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