Error analysis of supersonic air-to-air ejector schlieren pictures

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Error analysis of supersonic air-to-air ejector schlieren pictures

Popis výsledku v původním jazyce

The scope of this article is focused on general analysis of errors and uncertainties possibly arising from CFD-to-schlieren pictures matching. Analysis is based on classic analytical equations. These are firstly evaluated with the presumption of constantdensity gradient along the ray course. In other words, the deflection of light-ray caused by density gradient is negligible in compare to the cross size of constant gradient area. It is the aim of this work to determine, whether this presumption is applicable in case of supersonic air-to-air ejector. The colour and black and white schlieren pictures are carried out and compared to CFD results. Simulations had covered various eddy viscosities. Computed pressure gradients are transformed into deflectionangles and further to ray displacement. Resulting computed light- ray deflection is matched to experimental results.

Název v anglickém jazyce

Error analysis of supersonic air-to-air ejector schlieren pictures

Popis výsledku anglicky

The scope of this article is focused on general analysis of errors and uncertainties possibly arising from CFD-to-schlieren pictures matching. Analysis is based on classic analytical equations. These are firstly evaluated with the presumption of constantdensity gradient along the ray course. In other words, the deflection of light-ray caused by density gradient is negligible in compare to the cross size of constant gradient area. It is the aim of this work to determine, whether this presumption is applicable in case of supersonic air-to-air ejector. The colour and black and white schlieren pictures are carried out and compared to CFD results. Simulations had covered various eddy viscosities. Computed pressure gradients are transformed into deflectionangles and further to ray displacement. Resulting computed light- ray deflection is matched to experimental results.

Druh

D - Stať ve sborníku

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

<a href="/cs/project/GAP101%2F10%2F1709" target="_blank" >GAP101/10/1709: Trysky a difuzory pro ejektory</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název statě ve sborníku

International Conference EXPERIMENTAL FLUID MECHANICS 2012 Conference Proceedings

ISBN

978-80-7372-912-7

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

345-350

Název nakladatele

Technical university of Liberec

Místo vydání

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Místo konání akce

Hradec Králové

Datum konání akce

1. 1. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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