Influence of Secondary Flow Corner Vortex to Boundary Layer in a Channel Flow
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00518647" target="_blank" >RIV/61388998:_____/19:00518647 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23210/19:43956107
Result on the web
<a href="http://dx.doi.org/10.1063/1.5114739" target="_blank" >http://dx.doi.org/10.1063/1.5114739</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.5114739" target="_blank" >10.1063/1.5114739</a>
Alternative languages
Result language
angličtina
Original language name
Influence of Secondary Flow Corner Vortex to Boundary Layer in a Channel Flow
Original language description
Boundary layer in developing channel flow of air is experimentally studied by using the Stereo Particle Image Velocimetry (PIV) technique. The measurement is performed at fixed distance 400 mm from the channel inlet and the Reynolds number (based on the channel length, i.e. the distance from the boundary layer origin) is controlled via the imposed velocity. Re ranges from 8•104 to 8•105.The displacement boundary layer thickness δ* varies from 1.7 to 2.5 mm while the momentum one θ from 0.9 to 1.3 mm. It is found, that the critical Reynolds number of transition to turbulence of the boundary layer is lowered by the vicinity of the other perpendicular wall of the square channel, more accurately – it is accelerated by the larger-scale secondary flow, which results into turbulence at slightly lower Reynolds numbers. The laminar-turbulent transition is first apparent on the profiles of the turbulent kinetic energy, later on the velocity profiles. The mechanism might be probably such, that the turbulent flow structures generated in the secondary flow in the corner via Richardson energy transfer mechanism migrate into the laminar boundary layer. While the largescale structures cannot feed from the limited-size boundary layer, the smaller ones can strengthen there.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20302 - Applied mechanics
Result continuities
Project
<a href="/en/project/EF16_026%2F0008389" target="_blank" >EF16_026/0008389: Research Cooperation for Higher Efficiency and Reliability of Blade Machines</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
AIP Conference Proceedings
ISBN
978-073541858-5
ISSN
0094-243X
e-ISSN
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Number of pages
5
Pages from-to
030011
Publisher name
American Institute of Physics Inc.
Place of publication
College Park
Event location
Liptovsky Mikulas
Event date
Jun 19, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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