Study on Flow Boiling Characteristics in Rectangle Channel After Formation of Blisters

Plate-type fuel elements is one of the first fuel structure choice for the novel integrated PWR, however, blisters will appear on the cladding induced by irradiation and fission. In this work CFD method was used to investigate the subcooled boiling characteristic of the water in rectangle channel with round and pillow blisters, the modified RPI model was also proposed, we can draw conclusions as follows: In the channel with round blister, as the blisters will increase the local flow resistance and more fluid will flow through center of the channel. Boiling occurred only in the area near the edges, nearly no vapor appeared at the center of the channel. The boiling region in channel with pillow shape blisters is wider and concentrated between two pillow blisters and downstream of the non-blisters side. The dry out area are both in the downstream region of blisters for the two types of channels.

[1]  G. Su,et al.  Two-phase bubbly flow simulation using CFD method: A review of models for interfacial forces , 2020 .

[2]  G. Su,et al.  Flow and heat transfer characteristics in plate-type fuel channels after formation of blisters on fuel elements , 2019 .

[3]  G. Su,et al.  Numerical study on the single bubble rising behaviors under rolling conditions , 2019, Nuclear Engineering and Design.

[4]  Y. Liao,et al.  A baseline closure concept for simulating bubbly flow with phase change: A mechanistic model for interphase heat transfer coefficient , 2019, Nuclear Engineering and Design.

[5]  Eckhard Krepper,et al.  Eulerian modelling of turbulent bubbly flow based on a baseline closure concept , 2018, Nuclear Engineering and Design.

[6]  Soon-Heung Chang,et al.  Onset of Nucleate Boiling in narrow, rectangular channel for downward flow under low pressure , 2017 .

[7]  Omar S. Al-Yahia,et al.  Onset of Nucleate Boiling for subcooled flow through a one-side heated narrow rectangular channel , 2017 .

[8]  Yuxin Wu,et al.  Modeling of subcooled boiling by extending the RPI wall boiling model to ultra-high pressure conditions , 2017 .

[9]  Sichao Tan,et al.  Forced convective boiling heat transfer of water in vertical rectangular narrow channel , 2015 .

[10]  P. Gao,et al.  Experimental study of saturated boiling heat transfer and pressure drop in vertical rectangular channel , 2014 .

[11]  P. Gao,et al.  Experimental study of boiling incipience in vertical narrow rectangular channel , 2014 .

[12]  Daeseong Jo,et al.  Development of thermal hydraulic and margin analysis code for steady state forced and natural convective cooling of plate type fuel research reactors , 2014 .

[13]  Licheng Sun,et al.  An experimental study of bubble sliding characteristics in narrow channel , 2013 .

[14]  Eckhard Krepper,et al.  CFD for subcooled flow boiling: Simulation of DEBORA experiments , 2011 .

[15]  Eckhard Krepper,et al.  CFD simulation of convective flow boiling of refrigerant in a vertical annulus , 2008 .

[16]  H. Lee,et al.  Heat transfer correlation for boiling flows in small rectangular horizontal channels with low aspect ratios , 2001 .

[17]  Fabián J. Bonetto,et al.  Lateral forces on spheres in turbulent uniform shear flow , 1999 .

[18]  J. Flaherty,et al.  Analysis of phase distribution in fully developed laminar bubbly two-phase flow , 1991 .

[19]  D. Kenning,et al.  Subcooled flow boiling at high heat flux , 1985 .

[20]  Y. Sudo,et al.  Experimental study of differences in DNB heat flux between upflow and downflow in vertical rectangular channel. , 1985 .

[21]  Robert Cole,et al.  A photographic study of pool boiling in the region of the critical heat flux , 1960 .

[22]  Yingjie Wang,et al.  Recent progress of CFD applications in PWR thermal hydraulics study and future directions , 2021 .

[23]  T. Frank,et al.  The Favre Averaged Drag Model for Turbulent Dispersion in Eulerian Multi-Phase Flows , 2004 .

[24]  Michael Z. Podowski,et al.  MULTIDIMENSIONAL EFFECTS IN FORCED CONVECTION SUBCOOLED BOILING , 1990 .

[25]  S. Nazare,et al.  Irradiation behaviour of UAlx-Al dispersion fuels for thermal high flux reactors , 1977 .