Flow and turbulence control in a boundary layer wind tunnel using passive hardware devices

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F17%3A00477184" target="_blank" >RIV/68378297:_____/17:00477184 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s40799-017-0196-z" target="_blank" >https://link.springer.com/article/10.1007/s40799-017-0196-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s40799-017-0196-z" target="_blank" >10.1007/s40799-017-0196-z</a>

Result language

angličtina

Original language name

Flow and turbulence control in a boundary layer wind tunnel using passive hardware devices

Original language description

The Climatic Wind Tunnel (CWT) is a new experimental facility of the Institute of Theoretical and Applied Mechanics (ITAM) in Prague, Czech Republic. It is uniquely able to replicate precipitation and freezing effects on structural models in the climatic test section, and simultaneously perform aerodynamic and aeroelastic tests on structural models in the aerodynamic test section. Extensive measurements are carried out to investigate airflow and turbulence characteristics in the empty aerodynamic test section. Capability to experimentally simulate the atmospheric boundary layer (ABL) is studied using castellated barrier wall, Counihan vortex generators, and surface roughness elements. An individual influence of each of these passive hardware devices is separately tested as well, as they are commonly used combined, and their individual contributions to the ABL model characteristics are not well known. The analysis is based on hot-wire anemometer measurements carried out at various cross sections in the aerodynamic test section of the CWT. Experimental results are reported as mean velocity and turbulence intensity fields for the empty aerodynamic test section without passive hardware devices. Vertical profiles of mean velocity, turbulence intensity, and turbulence length scales, as well as power spectral density of velocity fluctuations, are reported for the ABL small-scale model. The barrier is observed to cause a decrease in flow velocity and an increase in turbulence close to surface. Vortex generators enhance turbulence throughout the entire height range under scope. Increased turbulence and decreased flow velocity are particularly exhibited close to surface due to surface roughness. Influence of each of the studied passive hardware devices on flow and turbulence is quantified in a dimensionless form to allow for separately accounting for their effects.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Experimental Techniques

ISSN

0732-8818

e-ISSN

—

Volume of the periodical

41

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

19

Pages from-to

643-661

UT code for WoS article

000416390400008

EID of the result in the Scopus database

2-s2.0-85034642129