TY - JOUR
T1 - Theoretical investigation of two-phase flow instability between parallel channels of natural circulation in rolling motion
AU - Wang, Xiaoyan
AU - Tian, Wenxi
AU - Huang, Siyang
AU - Chen, Ronghua
AU - Zhang, Dalin
AU - Qiu, Suizheng
AU - Su, G. H.
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/3
Y1 - 2019/3
N2 - In present work, the two-phase flow instability between rectangular parallel channels of natural circulation under static and rolling conditions was coupled studied theoretically. Models including two-phase flow instability, natural circulation system components, and the additional force were established in combination based on the homogenous model. A computational program was written in FORTRAN language which was solved by Gear multi-value method by using control volume integrating method. The program was validated with experiments, and the results matched well with the experiment data. The marginal stability boundary (MSB) maps under different parameters were obtained by using nondimensional numbers N sub and N pch . The influence of different kinds of pressure drop, inlet subcooling temperature of heating channels, system pressure, valve resistance, venturi flowmeters resistance, structure height, rolling condition, and the interaction effect of natural circulation and two-phase flow instability between rectangular parallel channels were analyzed. The results show that with the increase in system pressure and venturi flowmeters resistance, the system stability of natural circulation is enhanced. The influence of inlet subcooling temperature is nonlinear. The increase in valve resistance leads to the instability of system. The increase in structure height does not change system stability significantly. The rise in rolling angle and period both reduce the system stability.
AB - In present work, the two-phase flow instability between rectangular parallel channels of natural circulation under static and rolling conditions was coupled studied theoretically. Models including two-phase flow instability, natural circulation system components, and the additional force were established in combination based on the homogenous model. A computational program was written in FORTRAN language which was solved by Gear multi-value method by using control volume integrating method. The program was validated with experiments, and the results matched well with the experiment data. The marginal stability boundary (MSB) maps under different parameters were obtained by using nondimensional numbers N sub and N pch . The influence of different kinds of pressure drop, inlet subcooling temperature of heating channels, system pressure, valve resistance, venturi flowmeters resistance, structure height, rolling condition, and the interaction effect of natural circulation and two-phase flow instability between rectangular parallel channels were analyzed. The results show that with the increase in system pressure and venturi flowmeters resistance, the system stability of natural circulation is enhanced. The influence of inlet subcooling temperature is nonlinear. The increase in valve resistance leads to the instability of system. The increase in structure height does not change system stability significantly. The rise in rolling angle and period both reduce the system stability.
KW - Marginal stability boundary
KW - Natural circulation
KW - Parallel channels
KW - Rolling motion
KW - Two-phase flow instability
UR - https://www.scopus.com/pages/publications/85060093237
U2 - 10.1016/j.nucengdes.2018.12.019
DO - 10.1016/j.nucengdes.2018.12.019
M3 - 文章
AN - SCOPUS:85060093237
SN - 0029-5493
VL - 343
SP - 257
EP - 268
JO - Nuclear Engineering and Design
JF - Nuclear Engineering and Design
ER -