Flow patterns and related vibrations around an inclined U-profile

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F24%3A00587605" target="_blank" >RIV/68378297:_____/24:00587605 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.12989/was.2024.39.1.031" target="_blank" >https://doi.org/10.12989/was.2024.39.1.031</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12989/was.2024.39.1.031" target="_blank" >10.12989/was.2024.39.1.031</a>

Result language

angličtina

Original language name

Flow patterns and related vibrations around an inclined U-profile

Original language description

This paper examines the flow characteristics around an inclined prism with a U-shaped cross-section (“U-profile”)nand investigates the connection between the flow and flow-induced vibrations. The study employs a combined approach thatinvolves wind tunnel experiments and computational fluid dynamics (CFD) using an unsteady Reynolds-averaged Navier-Stokes (RANS) turbulence model. Distinct vortex formation patterns are observed in the flow field surrounding the stationary inclined profile. When the cavity of the profile faces away from the incoming flow, large vortices develop behind the profile. Conversely, when the cavity is oriented towards the oncoming flow, these vortices form within the cavity. Notably, due to the slow movement of these large vortices through the cavity, the frequency at which vortices are shed in the negative inclination case is lower compared to the positive inclination, where they form in the wake. Wind tunnel experiments reveal an intermittent transition between the two vortex formation patterns at zero inclination. Large vortices sporadically emerge both in the cavity and behind the profile. The simulation results demonstrate that when these large vortices occur at a frequency close to the structure’s natural frequency, they induce prominent pitch vibrations. This phenomenon is also sought after and presented in coupled vibration experiments. Additionally, the simulations indicate that when the natural frequency of the structure is considerably lower than the vortex shedding frequency, this type of vibration can be observed.

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

20101 - Civil engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Wind and Structures

ISSN

1226-6116

e-ISSN

1598-6225

Volume of the periodical

39

Issue of the periodical within the volume

1

Country of publishing house

KR - KOREA, REPUBLIC OF

Number of pages

15

Pages from-to

31-45

UT code for WoS article

001272391300003

EID of the result in the Scopus database

2-s2.0-85200129731