Experimental study on pressure drop for subcooled water flow boiling under high heat fluxes

被引：0
|
作者：
Yan J. [1 ]
Guo P. [1 ]
Ma J. [1 ]
Luo X. [1 ]
Bi Q. [2 ]
机构：
[1] State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an, 710048, Shaanxi
[2] State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi
来源：
Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 11期
关键词：
Convection; Heat transfer; Pressure drop; Subcooled boiling; Two-phase flow;
D O I：
10.11949/0438-1157.20190163
中图分类号：
学科分类号：
摘要：
Subcooled boiling has been widely used in high heat flow cooling applications, such as fusion reactor divertor cooling and pressurized water reactor core cooling. In this paper, the pressure drop characteristics of subcooled water flowing in a vertical stainless circular tube are experimentally investigated under high heat fluxes condition. The test tube has an inner diameter of 6 mm and a length-to-diameter of 44.4. The operating parameters are as follows: heat flux q = 7.5-12.5 MW/m2, mass flux G = 6000-10000 kg/(m2∙s), pressure p = 3-5 MPa, and inlet fluid temperature Tb = 80-200℃. The effects of mass flux, heat flux, pressure, boiling number and Jacob number on subcooling boiling pressure drop were discussed. The results show that subcooled boiling pressure drop increases with increasing heat and mass fluxes but decreases with increasing pressure. The experimental data are compared with the available empirical correlations, and it is found that these correlations cannot well predict our data, which may be mainly due to the variations in operating parameters and working fluids. Moreover, it is observed that the subcooled boiling pressure drop is affected by diameter effect. Therefore, a new correlation is proposed based on our previous correlation, in which a correction term for diameter effect is added. The new correlation can capture the experimental data within ±18% error bands. © All Right Reserved.
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页码：4257 / 4267
页数：10
相关论文
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