Experimental investigation of flow-induced vibration of a pitch-plunge NACA 0015 airfoil under deep dynamic stall

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F16%3A00464205" target="_blank" >RIV/61388998:_____/16:00464205 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/46747885:24620/16:00000670 RIV/46747885:24220/16:00000670

Výsledek na webu

<a href="http://ac.els-cdn.com/S0889974615300724/1-s2.0-S0889974615300724-main.pdf?_tid=31f9fa5a-d1c0-11e6-a705-00000aab0f26&acdnat=1483453588_64a6e8b2119c9afad3639cdec32a4569" target="_blank" >http://ac.els-cdn.com/S0889974615300724/1-s2.0-S0889974615300724-main.pdf?_tid=31f9fa5a-d1c0-11e6-a705-00000aab0f26&acdnat=1483453588_64a6e8b2119c9afad3639cdec32a4569</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jfluidstructs.2016.08.011" target="_blank" >10.1016/j.jfluidstructs.2016.08.011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental investigation of flow-induced vibration of a pitch-plunge NACA 0015 airfoil under deep dynamic stall

Popis výsledku v původním jazyce

The flow-induced vibration of a NACA 0015 airfoil model with pitch and plunge degrees of freedom is investigated in a high-speed wind tunnel using motion sensors, pressure sensors on the airfoil surface and synchronized high-speed Schlieren visualizations of the unsteady flow field at Reynolds numbers = – Re 180 000570000. Compared to other studies , the model has considerably smaller dimensions (with a chord length of 59.5 mm) and operates at higher flow velocities (from 37 to 125 m/s). With a relatively low pitch to plunge natural frequency ratio and zero initial incidence angle, the mode lis highly susceptible to deep dynamic stall in stability with the peak-to-peak pitch amplitude reaching up to 90°. The limit cycle response of the system as a function of freestream flow velocity is reported in detail, together with synchronized Schlieren visualizations of the flow field revealing the boundary layer behavior during dynamic stall. With increasing in flow velocity, the plunge amplitude increases dramatically, accompanied also by slight rise in the frequency of oscillation and decrease of the phase lag between pitch and plunge. The pitch amplitude has a maximum at 62 m/s and further decreases with increasing flow velocities.

Název v anglickém jazyce

Experimental investigation of flow-induced vibration of a pitch-plunge NACA 0015 airfoil under deep dynamic stall

Popis výsledku anglicky

The flow-induced vibration of a NACA 0015 airfoil model with pitch and plunge degrees of freedom is investigated in a high-speed wind tunnel using motion sensors, pressure sensors on the airfoil surface and synchronized high-speed Schlieren visualizations of the unsteady flow field at Reynolds numbers = – Re 180 000570000. Compared to other studies , the model has considerably smaller dimensions (with a chord length of 59.5 mm) and operates at higher flow velocities (from 37 to 125 m/s). With a relatively low pitch to plunge natural frequency ratio and zero initial incidence angle, the mode lis highly susceptible to deep dynamic stall in stability with the peak-to-peak pitch amplitude reaching up to 90°. The limit cycle response of the system as a function of freestream flow velocity is reported in detail, together with synchronized Schlieren visualizations of the flow field revealing the boundary layer behavior during dynamic stall. With increasing in flow velocity, the plunge amplitude increases dramatically, accompanied also by slight rise in the frequency of oscillation and decrease of the phase lag between pitch and plunge. The pitch amplitude has a maximum at 62 m/s and further decreases with increasing flow velocities.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Fluids and Structures

ISSN

0889-9746

e-ISSN

—

Svazek periodika

67

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

48-59

Kód UT WoS článku

000388778800004

EID výsledku v databázi Scopus

2-s2.0-84988601006