Experimental investigation on flow instabilities of ultra-supercritical water in parallel channels

Wang, Wenyu; Yang, Dong; Liang, Ziyu; Qu, Mofeng; Ouyang, Shijie

doi:10.1016/j.applthermaleng.2018.10.107

Cited by 24 publications

(2 citation statements)

References 35 publications

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“…In their study, it was found that increases in the inlet resistance coefficient and system pressure or decreasing the nonuniform degree of heating can stabilize the system. Wang et al 10 conducted an experimental study on flow instabilities in parallel channels of ultra‐supercritical water. In their experiment, it was found that increases in system pressure, inlet mass flowrate, inlet pressure drop coefficient or decreasing the inlet water temperature would stabilize the system.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis on flow instability of parallel channels in steam generator for sodium‐cooled fast reactor

Song

Zhang

et al. 2020

Int J Energy Res

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Summary Steam generator is the heat transfer component of sodium‐cooled fast reactor (SFR). It is possible to happen flow instability in the tubes of sodium heated once‐through steam generator (OTSG). In order to investigate the flow instability of parallel channels in sodium heated OTSG, a numerical analysis code called COSFIAS has been developed in Fortran language based on time‐domain method. The experimental data of parallel channels flow instability with uniform heating power condition and sodium heated condition have been applied to validate the code. The relative errors between calculation results and experimental data of uniform heating power condition are within 10%. The relative errors between calculation results and experimental data of sodium heated conditions are within 7%. The comparison results indicate that the COSFIAS program is reasonable and accurate for practical engineering application. In addition, the effects of important parameters on flow instability of parallel channels have been analyzed. From the calculation results some conclusions could be drawn: the decrease of water pressure would cause the increase of heat transfer power and destabilize the parallel channels system; in high subcooling region, the increase of inlet subcooling would stabilize the system; in low subcooling region, with the decrease of inlet subcooling, the parallel channels system would turn to be unstable and then return to be stable again; the increase of water mass flow rate could stabilize the parallel channels system.; the sodium heated condition is more stable than uniform heat flux condition in the same heat transfer power; the increase of sodium inlet temperature could destabilize the parallel channels system; the increase of sodium mass flow rate could destabilize the parallel channels system. In addition, the code could be applied to support the design work of sodium heated OTSG.

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Section: Introductionmentioning

confidence: 99%

Numerical analysis on flow instability of parallel channels in steam generator for sodium‐cooled fast reactor

Song

Zhang

et al. 2020

Int J Energy Res

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“…Xiangfei Kong et al [7] established an experimental database for heat transfer in supercritical water and a new standard for heat transfer deterioration in supercritical water. Wenyu Wang et al [8,9] performed a study on the instability of steam-water two-phase flow in a smooth pipe with a horizontal inclination of 20 degrees. They conducted preliminarily analysis of the influences exerted by pressure, mass flow, inlet and outlet throttling, inlet subcooling and compressible volume by suggesting the boundary conditions of pressure drop oscillation and density wave oscillation.…”

Section: Introductionmentioning

confidence: 99%

Study on the Movement and Deposition of Particles in Supercritical Water Natural Circulation Based on Grey Correlation Theory

et al. 2019

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The movement and deposition of particles that occur during their natural circulation in supercritical water exercise an important impact on the safe and stable operation of a supercritical water reactor (SCWR). When supercritical water flows in pipelines, a large number of corrosive particles may be generated due to pipeline corrosion or the purity of the fluid itself. The presence of particulate matter affects the heat transfer efficiency of the pipeline, increasing flow resistance and easily promoting heat transfer deterioration. ANSYS-CFX numerical analysis software was used to simulate the natural circulation loop of supercritical water, and micron particles were added in the initial flow field. The effects of heating power, particle concentration and particle diameter on particle deposition were obtained. Through this analysis, it can be concluded that the heating of the pipeline has a certain inhibitory effect on the deposition of particles. The rise in both initial particle concentration and particle diameter serve to reinforce the deposition of particles in the heating section. Depending on the degree of influence, the contributory parameters to particle deposition include particle diameter, particle concentration and heating power in turn.

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Experimental and Theoretical Study on CHF of a Ultra-Supercritical Circulating Fluidized Bed Boiler Water-Wall Tube at Near-Critical Pressures

Wang

Qing

et al. 2022

J. Therm. Sci.

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Experimental investigation on flow instabilities of ultra-supercritical water in parallel channels

Cited by 24 publications

References 35 publications

Numerical analysis on flow instability of parallel channels in steam generator for sodium‐cooled fast reactor

Numerical analysis on flow instability of parallel channels in steam generator for sodium‐cooled fast reactor

Study on the Movement and Deposition of Particles in Supercritical Water Natural Circulation Based on Grey Correlation Theory

Experimental and Theoretical Study on CHF of a Ultra-Supercritical Circulating Fluidized Bed Boiler Water-Wall Tube at Near-Critical Pressures

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