Interfacial area concentration in gas-liquid metal two-phase flow

Shen, Xiuzhong; Yamamoto, Toshihiro; Han, Xu; Hibiki, Takashi

doi:10.1007/s42757-021-0110-x

Cited by 14 publications

(4 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under the design condition, the high TKE region appears near the wall of blade, because the closer to the blade, the greater the shear stress on the flow layer, the greater the TKE corresponding. 32,33 Comparing Figure 16(a)-(c), it can be found that the TKE values of the initial scheme are significantly greater, followed by Opt1 and Opt2. The high TKE of the initial scheme is mainly distributed in the diffuser, the high TKE of the Opt1 is distributed in the impeller passage where near the blade, and the TKE in the diffuser decreases as a whole, among which there are high turbulence vortices at the dynamic static interface of the impeller and diffuser.…”

Section: Comparative Analysis Of Optimization Resultsmentioning

confidence: 95%

Shutdown idling performance of the nuclear main coolant pump under station blackout accident: An optimization study

Zhao

Batlló

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

Lead-cooled fast reactor (LFR) is an important reactor type of the Generation IV nuclear energy, and the main coolant pump (MCP) is the only and most critical power equipment in primary circuit of LFR. The shutdown idling performance of the MCP, is one of the most important safety indicators in the event of a station blackout accident. When the motor loses its power supply, the MCP needs to run under the inertia of the flywheel to ensure the coolant flow for a short time. This study mainly focuses on the idling mathematical model of the MCP under power failure accidents. In this study, taking the shutdown idling performance of the MCP as the optimization goal, the parametric optimization analysis of the impeller and diffuser structure of the MCP was carried out. Specifically, based on the platform ISIGHT, the software of CFturbo, TurboGrid, CFX, Matlab and FLOWMASTER are systematically integrated, the automated 3D modeling, automatic meshing and automatic CFD calculation of different hydraulic model of the MCP are realized. And the neural network mathematical model between the geometric parameters of MCP and the idling performance indicators is established. The study shows that there is a strong linear relationship between the idling performance of the MCP and its head and shaft power, and meridian parameters of Δβ 2, Z 1, Φ 1h and the radial surface parameters of Δβ 1 and Δβ 2, Z 1 and Φ 1h have the greatest impact on the idling performance of MCP.

show abstract

Section: Comparative Analysis Of Optimization Resultsmentioning

confidence: 95%

Shutdown idling performance of the nuclear main coolant pump under station blackout accident: An optimization study

Zhao

Batlló

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

show abstract

“…During the application, the fluid in the pipeline mostly flows as a two-phase flow. Therefore, Shen et al 98 investigated the flow characteristics of the gas-LM two-phase flow of Pb–Bi alloy by collecting the available experimental data of N2-Pb/Bi two-phase flow (vertical annular flow channel) and comparing it with the experimental data of air-water. The results show that the void fraction gradient is large owing to the heavy metal Pb/Bi eutectic.…”

Section: Physical and Chemical Properties Of Bismuth-based Liquid Metalsmentioning

confidence: 99%

Bismuth-based liquid metals: advances, applications, and prospects

Zhang,

Liu,

Deng

2024

Mater. Horiz.

View full text Add to dashboard Cite

show abstract

“…The simultaneous ow of gas and liquid phases is encountered in several and varied applications as petroleum & gas, chemical, nuclear, cooling applications (Sassi et al, 2020a;Shen et al, 2021;Hosni et al, 2023;Arabi et al, 2024a). The complex interaction between the compressible and the incompressible phases, in gas-liquid two-phase ow, makes the modeling of the hydrodynamics as well as heat and mass transfer, more critical for this type of ow compared to single phase ow.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Horizontal Gas-liquid Intermittent Flow Sub-Regimes Transitions: Physical Mechanisms and Flow Maps

Arabi,

salhi,

Zenati

et al. 2023

Preprint

View full text Add to dashboard Cite

These recent years, several experimental investigations were carried out on horizontal gas-liquid two-phase flow by considering the sub-regimes which are plug, Less Aerated Slug (LAS) and Highly Aerated Slug (HAS) flows. These sub-regimes classification is based on the shape of the elongated bubble/liquid slug interface as well as the aeration within liquid slugs. In this work, an extensive experimental visualization was performed using air-water mixture in a 30 mm ID horizontal pipe. The study has covered a total of 189 operating conditions. It was reported, for the first time, that each sub-regime had a specific mechanism for aeration of the liquid slug flow. the presence of gas bubbles within liquid slugs, in the case of plug flow, is due to the interfacial shear induced waves mechanism. The transitions to LAS and HAS flows are accompanied by the appearance of the shearing-off and scooping of the bubbles present in the liquid film into liquid slug mechanisms, respectively. In addition, the reported flow transition lines, as well those existing in the literature, were analyzed using different existing coordinate systems. This analysis allowed finding that the X-T system is the most suitable one for predicting the three flow sub-regimes.

show abstract

Interfacial area concentration in gas-liquid metal two-phase flow

Cited by 14 publications

References 43 publications

Shutdown idling performance of the nuclear main coolant pump under station blackout accident: An optimization study

Shutdown idling performance of the nuclear main coolant pump under station blackout accident: An optimization study

Bismuth-based liquid metals: advances, applications, and prospects

Analysis of Horizontal Gas-liquid Intermittent Flow Sub-Regimes Transitions: Physical Mechanisms and Flow Maps

Contact Info

Product

Resources

About