An Experimental Study on Slug-Bubbly Condensation Flows at Low Mass Velocity in a Square-Cross-Section Microchannel

El Achkar Georges; Miscevic Marc; Lavieille Pascal

首页> 外文期刊>Heat Transfer Engineering >An Experimental Study on Slug-Bubbly Condensation Flows at Low Mass Velocity in a Square-Cross-Section Microchannel

【24h】

An Experimental Study on Slug-Bubbly Condensation Flows at Low Mass Velocity in a Square-Cross-Section Microchannel

机译：An Experimental Study on Slug-Bubbly Condensation Flows at Low Mass Velocity in a Square-Cross-Section Microchannel

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

In this paper, condensation flows in a cross-flow air-cooled microcondenser were investigated for mass velocity lower than 12kg m(-2) s(-1), with n-pentane used as working fluid. The microcondenser consisted mainly of a transparent square-cross-section microchannel placed horizontally, having inner and outer edges of 553 and 675m, respectively, and a real length exposed to the coolant of 196mm. One of the features of the experimental bench was the choice of the air as coolant. The external heat transfer is thus limiting, which allows imposing a heat flux and consequently an almost linear variation of the vapor quality according to the axial position in the microchannel. Three flow zones were mainly identified: the annular zone, the intermittent (i.e., elongated bubbles or slug-bubbly) zone, and the spherical bubbles zone. A specific experimental procedure based on bubbles tracking was developed in order to determine the hydraulic and thermal parameters in the intermittent zone. The mean displacement and condensation velocities of the elongated bubbles were determined according to their mean length for different mass velocities of the n-pentane. Also, the mean latent heat flux released by the condensation of the elongated bubbles was determined according to their mean surface for different mass velocities of the n-pentane, and was compared to the imposed heat flux.

著录项

来源
《Heat Transfer Engineering》 |2016年第15期|1181-1189|共9页
作者
El Achkar Georges; Miscevic Marc; Lavieille Pascal;
展开▼
作者单位

Commissariat Energie Atom & Energies Alternat CEA, Lab Syst Therm & Thermodynam LS2T, 17 Rue Martyrs, F-38054 Grenoble, France;

Univ Toulouse 3, Lab Plasma & Convers Energie LAPLACE, F-31062 Toulouse, France;

展开▼
收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工业用热工设备;
关键词

An Experimental Study on Slug-Bubbly Condensation Flows at Low Mass Velocity in a Square-Cross-Section Microchannel

摘要

著录项

相关主题

期刊订阅