EXPERIMENTAL STUDY OF INFLUENCE OF ACTIVE METHODS OF FLOW CONTROL ON THE FLOW FIELD PAST CYLINDER

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F09%3A00161193" target="_blank" >RIV/68407700:21220/09:00161193 - 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

EXPERIMENTAL STUDY OF INFLUENCE OF ACTIVE METHODS OF FLOW CONTROL ON THE FLOW FIELD PAST CYLINDER

Popis výsledku v původním jazyce

The main emphasis of the paper is placed on an influence of an active method of flow control, as a synthetic jet, on a flow field around a cylinder of aspect ratio 1.8. It summarizes the influence of basic factors that affect the design of the syntheticjet actuator, particularly Strouhal number - nondimensional frequency (F+), Stokes number of output orifice (St), Reynolds number (Re), momentum coefficient (c) and a position of the output orifice of the synthetic jet actuator. The actuator is positioned in front of the boundary layer separation. The principle of a flow control with and without amplitude modulation was used in order to generate lower actuating frequency. An amount of input energy of the actuators that influences the flow filed was measured. A change of lift and drag coefficient was calculated from measured pressure distribution on the model. The alternatives with and without flow control are compared through the relation of saved up and the added energy.

Název v anglickém jazyce

EXPERIMENTAL STUDY OF INFLUENCE OF ACTIVE METHODS OF FLOW CONTROL ON THE FLOW FIELD PAST CYLINDER

Popis výsledku anglicky

The main emphasis of the paper is placed on an influence of an active method of flow control, as a synthetic jet, on a flow field around a cylinder of aspect ratio 1.8. It summarizes the influence of basic factors that affect the design of the syntheticjet actuator, particularly Strouhal number - nondimensional frequency (F+), Stokes number of output orifice (St), Reynolds number (Re), momentum coefficient (c) and a position of the output orifice of the synthetic jet actuator. The actuator is positioned in front of the boundary layer separation. The principle of a flow control with and without amplitude modulation was used in order to generate lower actuating frequency. An amount of input energy of the actuators that influences the flow filed was measured. A change of lift and drag coefficient was calculated from measured pressure distribution on the model. The alternatives with and without flow control are compared through the relation of saved up and the added energy.

Druh

O - Ostatní výsledky

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

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

Návaznosti

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

Rok uplatnění

2009

Kód důvěrnosti údajů

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