Water vapor condensation in forced convection flow over an airfoil

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dc.contributor.author Karabelas, SJ en
dc.contributor.author Markatos, NC en
dc.date.accessioned 2014-03-01T01:29:28Z
dc.date.available 2014-03-01T01:29:28Z
dc.date.issued 2008 en
dc.identifier.issn 1270-9638 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/19277
dc.subject Airfoil en
dc.subject Condensation cloud en
dc.subject Humidity en
dc.subject Two-phase flow en
dc.subject Water vapor en
dc.subject.classification Engineering, Aerospace en
dc.subject.other Airfoils en
dc.subject.other Forced convection en
dc.subject.other Mass transfer en
dc.subject.other Reynolds number en
dc.subject.other Water vapor en
dc.subject.other Condensation cloud en
dc.subject.other Forced convection flow en
dc.subject.other Condensation en
dc.title Water vapor condensation in forced convection flow over an airfoil en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.ast.2007.05.003 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.ast.2007.05.003 en
heal.language English en
heal.publicationDate 2008 en
heal.abstract The present paper presents an investigation of water vapor's condensation to liquid substance in highly convective flow conditions. An airfoil geometry was chosen to demonstrate the applicability of the model developed. The flow is considered subsonic and compressible, at high Reynolds number. The contribution of turbulence effects is accounted for by the Spalart-Allmaras model, which is suitable for such type applications. The study of condensation is based on a mixture two-phase model, which allows for interpenetrating substances, while following the economical single-fluid approach. Furthermore, the phases may move at different velocities (slip velocity) in a manner that is described by conservation equations. Results are presented for several flight conditions, concerning the angle of attack and the ambient-air humidity levels. Since the condensation effects are investigated on an airfoil configuration, emphasis has been given to the liquid mass-fraction distribution in several critical areas, where considerable formation of liquid droplets is observed. Results show that for humidity levels higher than 0.7, high liquid concentration areas are indicated onto the rear part of the foil. Attention is focused on the dispersion of the condensation cloud and on the areas of mass-transfer interaction between liquid droplets and humid air. (c) 2007 Elsevier Masson SAS. All rights reserved. en
heal.journalName Aerospace Science and Technology en
dc.identifier.doi 10.1016/j.ast.2007.05.003 en
dc.identifier.isi ISI:000255003500003 en
dc.identifier.volume 12 en
dc.identifier.issue 2 en
dc.identifier.spage 150 en
dc.identifier.epage 158 en

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