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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Imprimer: 1065-3090
ISSN En ligne: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v6.i3.20
pages 167-175

PIV EXPERIMENTS USING AN ENDOSCOPE FOR STUDYING PIPE FLOW

W. Xiong
Lehrstuhl für Strömungslehre, Universität Essen, D-45117 Essen, Germany
Wolfgang Merzkirch
Universitaet Duisburg-Essen Schwarzwaldstr. 18, 79102 Freiburg, Germany

RÉSUMÉ

The radial and tangential velocity components of the disturbed flow in a pipe are measured with PIV. The tracer particles illuminated with a light sheet normal to the pipe axis are imaged onto the recording camera through an endoscope. Swirl and vortical structures downstream of a 90° out-of-plane double bend can be measured. The results indicate that the flow immediately downstream of the bend is highly unsteady, and it must be concluded that the value of the usual time-averaged representations of this flow is questionable.


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