Experimental research of bubble characteristics in narrow rectangular channel under heaving motion

被引:36
作者
Hong, Gang [1 ,2 ]
Yan, Xiao [2 ]
Yang, Yan-Hua [1 ]
Xiao, Ze-Jun [2 ]
机构
[1] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China
[2] CNNC Key Lab Nucl Reactor Thermal Hydraul Technol, Chengdu 610041, Peoples R China
关键词
Two-phase flow; Subcooled boiling; Narrow rectangular channel; Heaving motion; Bubble diameter; Bubble velocity; Bubble number density; OSCILLATING ACCELERATION FIELD; CRITICAL HEAT-FLUX; LOW-FREQUENCY OSCILLATIONS; SUBCOOLED BOILING FLOW; NATURAL CIRCULATION; INTERFACIAL AREA; MARINE REACTOR; DEPARTURE; BEHAVIOR; DENSITY;
D O I
10.1016/j.ijthermalsci.2011.08.010
中图分类号
O414.1 [热力学];
学科分类号
摘要
Subcooled flow boiling is a commonly applied technique for achieving efficient heat transfer. Although numerous works have been done on two-phase flow phenomena, most of these works focus on land-based channels. Therefore, for identifying the heat transfer phenomena in the barge-mounted system, it is necessary to know the local flow condition in an oscillating acceleration field. In this study, forced convection subcooled water boiling experiments are conducted in narrow rectangular channels at low frequency oscillations. The bubble size, bubble velocity and bubble number density have been statistically analyzed under different heaving conditions and at different flow rates. The results of the bubble size distribution have been presented as cumulative distribution functions, which exhibit in reality a very wide spread of bubble size. The results show that an increase of the oscillation frequency causes an increase fluctuation of bubble size, bubble velocity and bubble number density. Under the same heaving condition, an increase of mass flow rate leads to a decrease fluctuation of bubble size and bubble velocity. A correlation has been sought for the fluctuation of bubble diameter due to heaving motion. The proposed model agrees well with the experimental data within the averaged relative deviation of +/- 19.2%. (C) 2011 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码:42 / 50
页数:9
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