Bifurkační a helikální proudění řízené azimutálně uspořádanými syntetizovanými proudy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F07%3A%230000420" target="_blank" >RIV/46747885:24220/07:#0000420 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Bifurcated and helical jet controlled by azimuthally arranged synthetic jets

Popis výsledku v původním jazyce

A round air jet was controlled using a system of synthetic jets distributed around the periphery in the exit plane. The aim was to investigate the influence of this jet control on heat/mass transfer if the controlled jet is impinging upon a a surface. Itfollowed the generally accepted idea that a suitable flow field unsteadiness can enhance heat transfer. For comparison purposes, a reference (steady) impinging jet was also generatedusing the same nozzle without the actuation. The actuation effect of the synthetic jets has been studied experimentally using the smoke visualization, PIV, and naphthalene sublimation techniques. The study confirms that the unsteadiness does not imply automatically an enhancement of heat transfer under all conditions. Heattransfer augmentation was found only in the stagnation area at small nozzle-to wallspacing. For this purpose, the preliminary results of PIV were discussed, and a future parametric PIV flow field study is planned.

Název v anglickém jazyce

Bifurcated and helical jet controlled by azimuthally arranged synthetic jets

Popis výsledku anglicky

A round air jet was controlled using a system of synthetic jets distributed around the periphery in the exit plane. The aim was to investigate the influence of this jet control on heat/mass transfer if the controlled jet is impinging upon a a surface. Itfollowed the generally accepted idea that a suitable flow field unsteadiness can enhance heat transfer. For comparison purposes, a reference (steady) impinging jet was also generatedusing the same nozzle without the actuation. The actuation effect of the synthetic jets has been studied experimentally using the smoke visualization, PIV, and naphthalene sublimation techniques. The study confirms that the unsteadiness does not imply automatically an enhancement of heat transfer under all conditions. Heattransfer augmentation was found only in the stagnation area at small nozzle-to wallspacing. For this purpose, the preliminary results of PIV were discussed, and a future parametric PIV flow field study is planned.

Druh

D - Stať ve sborníku

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2007

Kód důvěrnosti údajů

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

Název statě ve sborníku

5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT2007), Book of Abstracts

ISBN

978-1-86854-643-5

ISSN

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e-ISSN

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Počet stran výsledku

35

Strana od-do

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Název nakladatele

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Místo vydání

Sun City, South Africa

Místo konání akce

Sun City, South Africa

Datum konání akce

1. 1. 2007

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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