Cargando…
Experimental Research of Dynamic Instabilities in the Presence of Coiled Wire Inserts on Two-Phase Flow
The aim of this study is to experimentally investigate the effect of the coiled wire insertions on dynamic instabilities and to compare the results with the smooth tube for forced convection boiling. The experiments were conducted in a circular tube, and water was used as the working fluid. Two diff...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi Publishing Corporation
2013
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3556885/ https://www.ncbi.nlm.nih.gov/pubmed/23365547 http://dx.doi.org/10.1155/2013/714180 |
_version_ | 1782257253014831104 |
---|---|
author | Omeroglu, Gokhan Comakli, Omer Karagoz, Sendogan Sahin, Bayram |
author_facet | Omeroglu, Gokhan Comakli, Omer Karagoz, Sendogan Sahin, Bayram |
author_sort | Omeroglu, Gokhan |
collection | PubMed |
description | The aim of this study is to experimentally investigate the effect of the coiled wire insertions on dynamic instabilities and to compare the results with the smooth tube for forced convection boiling. The experiments were conducted in a circular tube, and water was used as the working fluid. Two different pitch ratios (H/D = 2.77 and 5.55) of coiled wire with circular cross-sections were utilised. The constant heat flux boundary condition was applied to the outer side of the test tube, and the constant exit restriction was used at the tube outlet. The mass flow rate changed from 110 to 20 g/s in order to obtain a detailed idea about the density wave and pressure drop oscillations, and the range of the inlet temperature was 15–35°C. The changes in pressure drop, inlet temperature, amplitude, and the period with mass flow rate are presented. For each configuration, it is seen that density wave and pressure drop oscillations occur at all inlet temperatures. Analyses show that the decrease in the mass flow rate and inlet temperature causes the amplitude and the period of the density wave and the pressure drop oscillations to decrease separately. |
format | Online Article Text |
id | pubmed-3556885 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Hindawi Publishing Corporation |
record_format | MEDLINE/PubMed |
spelling | pubmed-35568852013-01-30 Experimental Research of Dynamic Instabilities in the Presence of Coiled Wire Inserts on Two-Phase Flow Omeroglu, Gokhan Comakli, Omer Karagoz, Sendogan Sahin, Bayram ScientificWorldJournal Research Article The aim of this study is to experimentally investigate the effect of the coiled wire insertions on dynamic instabilities and to compare the results with the smooth tube for forced convection boiling. The experiments were conducted in a circular tube, and water was used as the working fluid. Two different pitch ratios (H/D = 2.77 and 5.55) of coiled wire with circular cross-sections were utilised. The constant heat flux boundary condition was applied to the outer side of the test tube, and the constant exit restriction was used at the tube outlet. The mass flow rate changed from 110 to 20 g/s in order to obtain a detailed idea about the density wave and pressure drop oscillations, and the range of the inlet temperature was 15–35°C. The changes in pressure drop, inlet temperature, amplitude, and the period with mass flow rate are presented. For each configuration, it is seen that density wave and pressure drop oscillations occur at all inlet temperatures. Analyses show that the decrease in the mass flow rate and inlet temperature causes the amplitude and the period of the density wave and the pressure drop oscillations to decrease separately. Hindawi Publishing Corporation 2013-01-10 /pmc/articles/PMC3556885/ /pubmed/23365547 http://dx.doi.org/10.1155/2013/714180 Text en Copyright © 2013 Gokhan Omeroglu et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Omeroglu, Gokhan Comakli, Omer Karagoz, Sendogan Sahin, Bayram Experimental Research of Dynamic Instabilities in the Presence of Coiled Wire Inserts on Two-Phase Flow |
title | Experimental Research of Dynamic Instabilities in the Presence of Coiled Wire Inserts on Two-Phase Flow |
title_full | Experimental Research of Dynamic Instabilities in the Presence of Coiled Wire Inserts on Two-Phase Flow |
title_fullStr | Experimental Research of Dynamic Instabilities in the Presence of Coiled Wire Inserts on Two-Phase Flow |
title_full_unstemmed | Experimental Research of Dynamic Instabilities in the Presence of Coiled Wire Inserts on Two-Phase Flow |
title_short | Experimental Research of Dynamic Instabilities in the Presence of Coiled Wire Inserts on Two-Phase Flow |
title_sort | experimental research of dynamic instabilities in the presence of coiled wire inserts on two-phase flow |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3556885/ https://www.ncbi.nlm.nih.gov/pubmed/23365547 http://dx.doi.org/10.1155/2013/714180 |
work_keys_str_mv | AT omeroglugokhan experimentalresearchofdynamicinstabilitiesinthepresenceofcoiledwireinsertsontwophaseflow AT comakliomer experimentalresearchofdynamicinstabilitiesinthepresenceofcoiledwireinsertsontwophaseflow AT karagozsendogan experimentalresearchofdynamicinstabilitiesinthepresenceofcoiledwireinsertsontwophaseflow AT sahinbayram experimentalresearchofdynamicinstabilitiesinthepresenceofcoiledwireinsertsontwophaseflow |