Streamwise and spanwise vortical structure merging inside the wake of an inclined flat plate

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00517335" target="_blank" >RIV/61388998:_____/19:00517335 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mechanics-industry.org/articles/meca/full_html/2019/07/mi190113/mi190113.html" target="_blank" >https://www.mechanics-industry.org/articles/meca/full_html/2019/07/mi190113/mi190113.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/meca/2019080" target="_blank" >10.1051/meca/2019080</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Streamwise and spanwise vortical structure merging inside the wake of an inclined flat plate

Popis výsledku v původním jazyce

The aim of this paper is to study the physics related to lift generation on an airfoil. A new hypothesis [1] of physical mechanism of flight relies on existence of streamwise vortical structures above the wing and inside the wake. The vortices origin as a consequence of flow instability inside the boundary layer developed under adverse pressure gradient. These structures are highly dynamical in nature, they change position and size very rapidly. A simple airfoil in the form of a flat plate with moderate angle of attack is considered in the presented research generate suitable flow at rather low Reynolds number. Stereo PIV time resolved measurement technique is used to capture high-dynamic data in several planes which are located in the wake and are perpendicular to freestream or parallel to the airfoil. The overall image of the flow field dynamics will be created using POD decomposition. Distinct flow patterns with associated kinetic energy are to be described as well as their role in the studied case. Existence of streamwise vorticity is proved, topology and other parameters are estimated in the paper, however related pressures and forces are not evaluated.

Název v anglickém jazyce

Streamwise and spanwise vortical structure merging inside the wake of an inclined flat plate

Popis výsledku anglicky

The aim of this paper is to study the physics related to lift generation on an airfoil. A new hypothesis [1] of physical mechanism of flight relies on existence of streamwise vortical structures above the wing and inside the wake. The vortices origin as a consequence of flow instability inside the boundary layer developed under adverse pressure gradient. These structures are highly dynamical in nature, they change position and size very rapidly. A simple airfoil in the form of a flat plate with moderate angle of attack is considered in the presented research generate suitable flow at rather low Reynolds number. Stereo PIV time resolved measurement technique is used to capture high-dynamic data in several planes which are located in the wake and are perpendicular to freestream or parallel to the airfoil. The overall image of the flow field dynamics will be created using POD decomposition. Distinct flow patterns with associated kinetic energy are to be described as well as their role in the studied case. Existence of streamwise vorticity is proved, topology and other parameters are estimated in the paper, however related pressures and forces are not evaluated.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/GA17-01088S" target="_blank" >GA17-01088S: Prostorová nestabilita smykové vrstvy při nepříznivém gradientu tlaku</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Mechanics & Industry

ISSN

2257-7777

e-ISSN

—

Svazek periodika

20

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

13

Strana od-do

705

Kód UT WoS článku

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EID výsledku v databázi Scopus

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