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Flow visualisation by means of Electronic Speckle Pattern Interferometry (ESPI)

Abstract
This research report details the design, construction, implementation and optimization
of a quantitative movable flow visualization technique named Electronic Speckle
Pattern Interferometry (ESPI).
ESPI is a powerful visualisation technique that can allow for full flowfield analysis. It
is thus possible to quantitatively determine the refractive index variation and hence
the density variation in a compressible gas flow.
Complementary results between previous work done and the current work shows the
integrity of ESPI results
Flowfields that were investigated included – candle flame, axis symmetric and nonaxis
symmetric nozzles.
Due to advanced CCD technology, there have been improvements in the overall
image quality. Post processing of the images produced clearer images and hence
better results.
The technique was applied on multiple test rigs, proving its versatility

Identiferoai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/4748
Date09 April 2008
CreatorsMichal, Eli
Source SetsSouth African National ETD Portal
LanguageEnglish
Detected LanguageEnglish
TypeThesis
Format71639556 bytes, application/pdf, application/pdf

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