FLOW BOILING PATTERNS OF LIQUID NITROGEN IN MICRO-TUBES

被引：0
|
作者：
Zhang, P. [1 ]
Fu, X. [1 ]
Wang, R. Z. [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Inst Refrigerat & Cryogen, Shanghai 200240, Peoples R China
来源：
HT2008: PROCEEDING OF THE ASME SUMMER HEAT TRANSFER CONFERENCE, VOL 3 | 2009年
关键词：
AIR-WATER; 2-PHASE; MICROCHANNELS; REGIMES;
D O I：
暂无
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Application of liquid nitrogen to cooling is widely used in such fields as cooling of the high temperature superconducting devices, cryosurgery and so on. In order to have a full understanding of the flow and heat transfer characteristics of liquid nitrogen in micro-tube, high-speed digital photography was employed to acquire the typical flow boiling patterns of liquid nitrogen in micro-tubes in the experiments. The main flow patterns were bubbly flow, slug flow, chum flow and annular flow. And the confined bubbly flow and mist flow were also observed. These flow patterns were characterized on the flow regime maps. And the surface tension force and the size of the tube diameter were found to be the major factors affecting the flow pattern transitions.
引用
收藏
页码：741 / 745
页数：5
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