Experimental study on geysering in an open natural circulation system

被引：0

作者：

Hou X. ^{[1
]}

Sun Z. ^{[1
]}

Sun Q. ^{[2
]}

Fan G. ^{[1
]}

Lei W. ^{[1
]}

机构：

[1] Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin

[2] College of Energy and Power Engineering, Harbin Engineering University, Harbin

来源：

Sun, Zhongning (sunzhongning@hrbeu.edu.cn) | 1600年 / Editorial Board of Journal of Harbin Engineering卷 / 37期

关键词：

Boiling delay time; Experimental investigation; Flow pattern transformation; Geysering; Geysering region; Open natural circulation; Thermal equilibrium analysis;

D O I：

10.11990/jheu.201503069

中图分类号：

学科分类号：

摘要：

To determine the mechanism and characteristics of the geysering phenomenon in an open natural circulation system, we performed experimental and thermal equilibrium analyses. Results show that the primary reason for geysering is a thermal non-equilibrium relation between the heating power and natural circulation heat transfer ability in an incubation period, which can lead to localized overheating at the heating tube outlet. Meanwhile, the basis of the slug flow is the polymerization of subcooled boiling bubbles, which introduces a disturbance, thus causing localized flashes of overheated fluid that result in the geysering phenomenon. Experimental results show that the heating power, circulation velocity, and outlet resistance are critical in a geysering region. Moreover, we develop a new method for determining the boiling delay time by calculating the geysering oscillation period with respect to the physical geysering process; we found that the predictive effect is good. © 2016, Editorial Department of Journal of HEU. All right reserved.

引用

页码：556 / 561

页数：5

共 11 条

[1] Guo X., Sun Z., Wang J., Et al., Steady-state performances and scaling analyses for an open flashing-driven natural circulation system, Progress in Nuclear Energy, 87, pp. 1-14, (2016)
[2] Shi S., Schlegel P.J., Brooks C.S., Et al., Experimental investigation of natural circulation instability in a BWR-type small modular reactor, Progress in Nuclear Energy, 85, pp. 96-107, (2015)
[3] Yang S.K., Stability of flashing-driven natural circulation in a passive moderator cooling system for Canadian SCWR, Nuclear Engineering and Design, 276, pp. 259-276, (2014)
[4] Kuran S., Xu Y., Sun X., Et al., Startup transient simulation for natural circulation boiling water reactors in PUMA facility, Nuclear Engineering and Design, 236, 22, pp. 2365-2375, (2006)
[5] Aritomi M., Chiang J.H., Mori M., Geysering in parallel boiling channels, Nuclear Engineering and Design, 141, 1-2, pp. 111-121, (1993)
[6] Qi Z., Tong L., Cao X., Preliminary experimental study on geysering phenomena in heating system, Nuclear Power Engineering, 33, pp. 64-68, (2012)
[7] Zhang L., Lin W., Lu X., Et al., Geysering research in cryogenic transfer system, Journal of Shanghai Jiao Tong University, 39, 2, pp. 238-241, (2005)
[8] Kuncoro H., Rao Y.F., Fukuda K., An experimental study on the mechanism of geysering in a closed two-phase thermosyphon, International Journal of Multiphase Flow, 21, 6, pp. 1243-1252, (1995)
[9] Qi Z., Chen J., Tong L., Et al., Geysering mechanism and model study for heating system, Atomic Energy Science and Technology, 47, 4, pp. 546-551, (2013)
[10] Taitel Y., Bornea D., Dukler A.E., Modelling flow pattern transitions for steady upward gas-liquid flow in vertical tubes, AIChE Journal, 26, 3, pp. 345-354, (1980)

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