Flow Past a Self-oscillating Airfoil with Two Degrees of Freedom: Measurements and Simulations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F14%3A%230003394" target="_blank" >RIV/46747885:24220/14:#0003394 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/46747885:24620/14:00000327

Výsledek na webu

<a href="http://dx.doi.org/10.1051/epjconf/20146702108" target="_blank" >http://dx.doi.org/10.1051/epjconf/20146702108</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/20146702108" target="_blank" >10.1051/epjconf/20146702108</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Flow Past a Self-oscillating Airfoil with Two Degrees of Freedom: Measurements and Simulations

Popis výsledku v původním jazyce

The paper focuses on investigation of the unsteady subsonic airflow past an elastically supported airfoil for subcritical flow velocities and during the onset of the flutter instability. A physical model of the NACA0015 airfoil has been designed and manufactured, allowing motion with two degrees of freedom: pitching (rotation about the elastic axis) and plunging (vertical motion). The structural mass and stiffness matrix can be tuned to certain extent, so that the natural frequencies of the two modes approach as needed. The model was placed in the measuring section of the wind tunnel in the aerodynamic laboratory of the Institute of Thermomechanics in Novy Knin, and subjected to low Mach number airflow up to the flow velocities when self-oscillation reach amplitudes dangerous for the structural integrity of the model. The motion of the airfoil was registered by a high-speed camera, with synchronous measurement of the mechanic vibration and discrete pressure sensors on the surface of the airfoil. The results of the measurements are presented together with numerical simulation results, based on a finite volume CFD model of airflow past a vibrating airfoil..

Název v anglickém jazyce

Flow Past a Self-oscillating Airfoil with Two Degrees of Freedom: Measurements and Simulations

Popis výsledku anglicky

The paper focuses on investigation of the unsteady subsonic airflow past an elastically supported airfoil for subcritical flow velocities and during the onset of the flutter instability. A physical model of the NACA0015 airfoil has been designed and manufactured, allowing motion with two degrees of freedom: pitching (rotation about the elastic axis) and plunging (vertical motion). The structural mass and stiffness matrix can be tuned to certain extent, so that the natural frequencies of the two modes approach as needed. The model was placed in the measuring section of the wind tunnel in the aerodynamic laboratory of the Institute of Thermomechanics in Novy Knin, and subjected to low Mach number airflow up to the flow velocities when self-oscillation reach amplitudes dangerous for the structural integrity of the model. The motion of the airfoil was registered by a high-speed camera, with synchronous measurement of the mechanic vibration and discrete pressure sensors on the surface of the airfoil. The results of the measurements are presented together with numerical simulation results, based on a finite volume CFD model of airflow past a vibrating airfoil..

Druh

D - Stať ve sborníku

CEP obor

BI - Akustika a kmity

OECD FORD obor

—

Projekt

<a href="/cs/project/GA13-10527S" target="_blank" >GA13-10527S: Analýza subsonického flutteru elasticky uložených profilů s využitím interferometrie a CFD</a><br>

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

EPJ Web of Conferences

ISBN

978-80-260-5375-0

ISSN

2100-014X

e-ISSN

—

Počet stran výsledku

8

Strana od-do

1-8

Název nakladatele

EDP Sciences

Místo vydání

Les Ulis, Francie

Místo konání akce

Kutná Hora

Datum konání akce

1. 1. 2013

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000343672100111