Two-phase pressure drop of air–water in minichannels

✍ Scribed by Krzysztof Dutkowski

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 758 KB
• Volume: 52
• Category: Article
• ISSN: 0017-9310
• DOI: 10.1016/j.ijheatmasstransfer.2009.04.018

✦ Synopsis

Results of experimental investigations of pressure drop in two-phase adiabatic flow in tubular minichannels are presented. Air-water mixture was used as a working fluid. Eight tubular minichannels with internal diameter d w = 1.05 Ä 2.30 mm and the test section length of 300 mm made from stainless steel were used. The investigations were conducted within the range: mass flow rate of water 0.65 Ä 59 kg/h, mass flow rate of air 0.011 Ä 0.72 kg/h, mass fraction of air in the two-phase mixture x = 0.0003 Ä 0.22, total mass flux (wq) = 139 Ä 8582 kg/(m 2 s). It was found, on the basis of the experimental investigations, that the application of commonly used methods to evaluation of pressure drop in two-phase flow, provided poor results. It is therefore necessary to make some corrections and modifications for the two-phase flow in minichannels correlations.