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PHASE-SYNCRONISED INVESTIGATIONS OF TRIGGERED VORTICES IN IMPINGING JETS
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SYSNO ASEP 0324547 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title PHASE-SYNCRONISED INVESTIGATIONS OF TRIGGERED VORTICES IN IMPINGING JETS Title Výzkum fázově spouštěných vírů v impaktním proudění Author(s) Tesař, Václav (UT-L) RID
Něnička, Václav (UT-L) RIDSource Title Engineering Mechanics 2009. - Praha : ÚTAM, 2009 / Náprstek, J. ; Fischer C. - ISBN 978-80-86246-35-2 Pages s. 270-271 Number of pages 2 s. Publication form CD ROM - CD ROM Action Engineering mechanics 2009 Event date 11.05.2009-14.05.2009 VEvent location Svratka Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords impinging jets ; vortical motion ; phase synchronisation Subject RIV BK - Fluid Dynamics R&D Projects IAA200760705 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA101/07/1499 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation Impinging jets can transfer the highest achievable thermal flux into (or out from) solid bodies. The transport is significantly influenced by complex and so far not fully understood vortical structures that develop due to hydrodynamic instability. This contribution describes experiments with visualisation of impinging air jets in which periodic formation of vortices was triggered by azimuthal travelling waves generated in nozzle exit - and was phase-synchronised with the camera. Visualisation was by laser light scattered from water mist particles added to the supplied air. The instability structures were identified in the images by using their coherence. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2010
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