Analysis of Synthetic Jet Flow by Means of Proper Orthogonal Decomposition and Dynamic Mode Decomposition Based on CFD Data

Kód výsledku v IS VaVaI

RIV/68407700:21220/15:00242221 - isvavai.cz

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of Synthetic Jet Flow by Means of Proper Orthogonal Decomposition and Dynamic Mode Decomposition Based on CFD Data

Popis výsledku v původním jazyce

The results of numerical simulation of synthetic jet flow are analysed by means of modal decomposition technique. Three typical laminar regimes are compared from the point of view of modal decomposition. The first regime is without synthetic jet creationwith Reynolds number Re = 76 and Stokes number S = 19:7. The regime of synthetic jet without vortex roll-up is defined by Re = 145 and S = 19.7. The third regime of synthetic jet with vortex roll-up is regime with Re = 329 and S = 19.7. Modal decomposition of obtained flow fields is done using proper orthogonal decomposition (POD) and using dynamic mode decomposition (DMD). Vortex street like structure with travelling vortex ring is identified using the topology of dynamic modes where the vortexes arevisualized using the concept of residual vorticity. The speed of travelling vortex is evaluated using the wavelength identified from DMD modes.

Název v anglickém jazyce

Analysis of Synthetic Jet Flow by Means of Proper Orthogonal Decomposition and Dynamic Mode Decomposition Based on CFD Data

Popis výsledku anglicky

The results of numerical simulation of synthetic jet flow are analysed by means of modal decomposition technique. Three typical laminar regimes are compared from the point of view of modal decomposition. The first regime is without synthetic jet creationwith Reynolds number Re = 76 and Stokes number S = 19:7. The regime of synthetic jet without vortex roll-up is defined by Re = 145 and S = 19.7. The third regime of synthetic jet with vortex roll-up is regime with Re = 329 and S = 19.7. Modal decomposition of obtained flow fields is done using proper orthogonal decomposition (POD) and using dynamic mode decomposition (DMD). Vortex street like structure with travelling vortex ring is identified using the topology of dynamic modes where the vortexes arevisualized using the concept of residual vorticity. The speed of travelling vortex is evaluated using the wavelength identified from DMD modes.

Druh

O - Ostatní výsledky

CEP obor

JU - Aeronautika, aerodynamika, letadla

OECD FORD obor

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Projekt

GA14-08888S: Řízení proudových polí pomocí oscilací tekutiny

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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