Structure of Flow Fields Downstream of Two Different Swirl Generators

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F14%3APU107808" target="_blank" >RIV/00216305:26210/14:PU107808 - isvavai.cz</a>
Result on the web
<a href="http://www.engineeringmechanics.cz/pdf/20_5_339.pdf" target="_blank" >http://www.engineeringmechanics.cz/pdf/20_5_339.pdf</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Structure of Flow Fields Downstream of Two Different Swirl Generators
Original language description
This paper discusses the comparison of the flow fields downstream of two different swirl generators. Both swirl generators are used to imitate the flow at the exit of the hydraulic turbine runner and study spatio-temporal behaviour of the swirling flow in the draft tube (i.e. outlet diffuser part of the hydraulic turbine), which undergoes breakdown into vortex rope. Unsteady CFD computations are carried out for identical Reynolds number. Resulting velocity and vorticity profiles are correlated with thestructure of the vortex rope. Difference in excited pressure pulsations is illustrated on amplitude-frequency spectra of static wall pressure.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BK - Liquid mechanics
OECD FORD branch
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Project
<a href="/en/project/GA101%2F09%2F1715" target="_blank" >GA101/09/1715: Cavitating vortical structures induced by rotation of liquid</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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