Different regimes of the flow around a U-beam and their importance for flutter vibrations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F15%3A00449183" target="_blank" >RIV/68378297:_____/15:00449183 - isvavai.cz</a>

Výsledek na webu

<a href="http://publik.tuwien.ac.at/files/PubDat_240986.pdf" target="_blank" >http://publik.tuwien.ac.at/files/PubDat_240986.pdf</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Different regimes of the flow around a U-beam and their importance for flutter vibrations

Popis výsledku v původním jazyce

Vibrations of a slender U-profile in turbulent cross-flow are studied with the aid of 2D-CFD simulations and wind tunnel experiments. The simulations indicate that there are two different patterns of the flow around the stationary U-profile. Vortices form either towards the leeward flange of the profile, or behind its windward flange. The latter vortices move through the cavity of the profile and lead to large fluctuations of the aerodynamic forces. Thus, the flow patterns determine the vibration response of the U-profile. By comparison with wind tunnel experiments it is shown that aspects of either flow pattern are present in the real flow field. Contrary to simulation results the real flow appears to change between either flow pattern. At zero inclination neither flow pattern prevails. Inclining the pro- file favours one or the other flow pattern. The importance of the inclination angle and the flow pattern becomes apparent when studying free vibrations of a tensioned belt with U-sha

Název v anglickém jazyce

Different regimes of the flow around a U-beam and their importance for flutter vibrations

Popis výsledku anglicky

Vibrations of a slender U-profile in turbulent cross-flow are studied with the aid of 2D-CFD simulations and wind tunnel experiments. The simulations indicate that there are two different patterns of the flow around the stationary U-profile. Vortices form either towards the leeward flange of the profile, or behind its windward flange. The latter vortices move through the cavity of the profile and lead to large fluctuations of the aerodynamic forces. Thus, the flow patterns determine the vibration response of the U-profile. By comparison with wind tunnel experiments it is shown that aspects of either flow pattern are present in the real flow field. Contrary to simulation results the real flow appears to change between either flow pattern. At zero inclination neither flow pattern prevails. Inclining the pro- file favours one or the other flow pattern. The importance of the inclination angle and the flow pattern becomes apparent when studying free vibrations of a tensioned belt with U-sha

Druh

D - Stať ve sborníku

CEP obor

JM - Inženýrské stavitelství

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the Conference on Modelling Fluid Flow 2015

ISBN

978-963-313-190-9

ISSN

—

e-ISSN

—

Počet stran výsledku

8

Strana od-do

1-8

Název nakladatele

TU Wien

Místo vydání

Wien

Místo konání akce

Budapešť

Datum konání akce

1. 9. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—