Two-phase flow behaviour in a smooth hairpin tube: analysis of the disturbance using capacitive measurements

De Kerpel, K.; De Keulenaer, T.; De Schampheleire, S.; De Paepe, M.

dc.contributor.author	De Kerpel, K.
dc.contributor.author	De Keulenaer, T.
dc.contributor.author	De Schampheleire, S.
dc.contributor.author	De Paepe, M.
dc.date.accessioned	2015-04-09T07:53:09Z
dc.date.available	2015-04-09T07:53:09Z
dc.date.issued	2014
dc.description.abstract	Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.	en_ZA
dc.description.abstract	Two-phase refrigerant flow up-and downstream of a sharp return bend is studied. The capacitance of the flow is logged at several locations up-and downstream of the return bend. Analysis of the capacitance time traces is performed to evaluate the presence of a flow disturbance due to the bend. A vertically oriented bend is studied with an inner diameter of 8 mm and a radius of 11 mm. Smooth straight tubes with an internal diameter of 8 mm are connected to the in- and outlet of the return bend. Upward as well as downward directed flows are studied. The refrigerant R134a is used and the mass flux G and vapour quality x are varied between 200 and 400 kg/m²s and 0-1, respectively. A downstream disturbance up to 21.5D is observed for both up-and downward flow.	en_ZA
dc.description.librarian	cf2015	en_ZA
dc.format.extent	8 pages	en_ZA
dc.format.medium	PDF	en_ZA
dc.identifier.citation	De Kerpel, K, De Keulenaer, T, De Schampheleire, S, De Paepe, M 2014, 'Two-phase flow behaviour in a smooth hairpin tube: analysis of the disturbance using capacitive measurements', Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.	en_ZA
dc.identifier.isbn	97817759206873
dc.identifier.uri	http://hdl.handle.net/2263/44278
dc.publisher	International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics	en_ZA
dc.rights	© 2014 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.	en_ZA
dc.subject	Two-phase flow	en_ZA
dc.subject	Capacitance	en_ZA
dc.subject	Smooth tube	en_ZA
dc.subject	Two-phase refrigerant flow	en_ZA
dc.title	Two-phase flow behaviour in a smooth hairpin tube: analysis of the disturbance using capacitive measurements	en_ZA
dc.type	Presentation	en_ZA