| Titre : |
An investigation of venturi and coanda effects in blown film cooling |
| Type de document : |
texte imprimé |
| Auteurs : |
V. Sidiropoulos, Auteur ; J. Vlachopoulos, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 40-45 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.9 Polymères |
| Résumé : |
Numerical simulation of turbulent air flow tangentially impinging on a blown film bubble has been carried out. The cooling air is assumed to originate from a dual orifice adjustable air-ring. The stream line pattern and heat flux are determined through a finite volume numerical technique using a version of the so called k-ε modeling. It is shown that as the air flows through the air ring passage relatively large under-pressure is created (Venturi effect), which applies a suction to the bubble. Depending on the flow rates and geometrical configurations the air jet may attach itself (Coanda effect) to either the air ring surface and/or to the bubble. The Coanda effect has a significant influence on local heat flux. The numerical results suggest that the Venturi and Coanda effects influence significantly process stability, production rate and final film properties. |
| DOI : |
10.3139/217.1575 |
| En ligne : |
https://drive.google.com/file/d/1z8QmfewGlNE_m5c46tQQpGoL6uAEsjXs/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16072 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XV, N° 1 (03/2000) . - p. 40-45
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An investigation of venturi and coanda effects in blown film cooling in INTERNATIONAL POLYMER PROCESSING, Vol. XV, N° 1 (03/2000)
