Water vapor condensation in forced convection flow over an airfoil

Karabelas, SJ; Markatos, NC

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.publisher	ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER	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