Please use this identifier to cite or link to this item:
|Type:||Artigo de evento|
|Title:||Experimental And Numerical Study On The Two-phase Flow Distribution Between Two Passes Of A Heat Exchanger|
|Author:||Mendes de Moura Luiz Felipe|
|Abstract:||Two-phase flow maldistribution can have a significant impact on the thermal performance of a heat exchanger. The problem is particularly important in the case of a multiple-pass heat exchanger, when two sucessive passes are linked by a common header. This paper presents a study on the two-phase flow inside a common header. Mass flow rate measurements of each phase performed at each channel outlet of the second pass allowed us to determine the influence of mass flow rate, gas quality, flow direction (upward or downward) and common header geometry upon flow distribution. Local gas void fraction measurements inside common header, performed with a local optical probe, contributed to the understanding of the flow patterns. A two-dimensional two-phase flow computational code was developed from a two-fluid model. Modelling of interfacial momentum transfer was used in order to take into account two-phase flow patterns in common headers. Numerical simulation results show qualitative agreement with experimental results. Present theoretical model limitations are analyzed and future improvements are proposed.|
|Editor:||Publ by ASME, New York, NY, United States|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.