Two-phase flow patterns and pressure drop inside horizontal tubes containing twisted-tape inserts
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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| Data(s) |
06/11/2013
06/11/2013
2012
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| Resumo |
This paper presents an experimental study on two-phase flow patterns and pressure drop of R134a inside a 15.9 mm ID tube containing twisted-tape inserts. Experimental results were obtained in a horizontal test section for twisted-tape ratios of 3, 4, 9 and 14, mass velocities ranging from 75 to 250 kg/m(2) s and saturation temperatures of 5 and 15 degrees C. An unprecedented discussion on two-phase flow patterns inside tubes containing twisted-tape inserts is presented and the flow pattern effects on the frictional pressure drop are carefully discussed. Additionally, a new method to predict the frictional pressure drop during two-phase flow inside tubes containing twisted-tape inserts is proposed. (C) 2012 Elsevier Ltd. All rights reserved. CNPq (The National Council for Scientific and Technological Development, Brazil) [474403/2008-4] CNPq (The National Council for Scientific and Technological Development, Brazil) |
| Identificador |
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, OXFORD, v. 47, n. 3, pp. 50-65, DEC, 2012 0301-9322 http://www.producao.usp.br/handle/BDPI/42189 10.1016/j.ijmultiphaseflow.2012.07.003 |
| Idioma(s) |
eng |
| Publicador |
PERGAMON-ELSEVIER SCIENCE LTD OXFORD |
| Relação |
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW |
| Direitos |
closedAccess Copyright PERGAMON-ELSEVIER SCIENCE LTD |
| Palavras-Chave | #TWISTED-TAPE #FLOW PATTERNS #PRESSURE DROP #CONVECTIVE BOILING #SWIRL FLOW #HEAT-TRANSFER #SWIRL FLOW #ISOTHERMAL TUBES #MECHANICS |
| Tipo |
article original article publishedVersion |
