자료유형  

 학위논문

Control Number  

0017160615

International Standard Book Number  

9798381968651

Dewey Decimal Classification Number  

620

Main Entry-Personal Name  

Yan, Yi.

Publication, Distribution, etc. (Imprint  

[S.l.] : University of California, Los Angeles., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

119 p.

General Note  

Source: Dissertations Abstracts International, Volume: 85-09, Section: B.

General Note  

Advisor: Abdou, Mohamed A.

Dissertation Note  

Thesis (Ph.D.)--University of California, Los Angeles, 2024.

Summary, Etc.  

요약The liquid-metal fusion blanket constitutes a pivotal element in the infrastructure of magnetic field confined fusion nuclear power plants, undertaking a multifaceted role crucial to their operation. Its responsibilities span from breeding tritium, essential fuel for fusion reactions, to converting the energy from high-energy neutrons and plasma into electricity, while also shielding structural components from the impact of high-energy species produced during fusion processes. Specifically engineered for this purpose, a liquid metal fusion blanket employs materials such as lithium or lithium alloys, serving as coolants and breeding materials simultaneously. Within the domain of liquid-metal (LM) blankets, mixed-convection presents a significant challenge, emerging as the dominant flow phenomenon in most fusion LM blanket designs. The magnetohydrodynamics (MHD) flows of liquid breeders, like PbLi, within blanket conduits experience notable buoyancy forces due to heightened temperature gradients resulting from intense heat loads. The intricate interplay of MHD effects and buoyant forces gives rise to strongly coupled phenomena. Understanding and predicting the complex flow behaviors arising from the interaction of these multiple effects necessitate both experimental data and numerical investigations of three-dimensional mixed-convection MHD flows for advancing LM blanket designs.Chapter two of this thesis outlines the establishment of the MaPLE-U facility, dedicated to high-temperature liquid metal experiments under intense magnetic fields and various flow orientations with respect to gravity. Subsequently, the first experimental dataset is presented, focusing on PbLi, a prominent blanket breeding candidate, to elucidate mixed-convection MHD flow behaviors and heat transfer phenomena. The findings challenge the assumption of complete flow laminarization under strong MHD effects, widely adopted in LM MHD R&D strategy, emphasizing the need for simultaneous consideration of multiple effects.Chapter three delves into numerical investigations employing COMSOL Multiphysics, where flow predictions are validated against analytical solutions, benchmarked experimental data, and results from other MHD codes. A novel MHD-heat transfer flow model is developed to address the lack of numerical simulation tools for wall-bounded fully developed flows concurrently coupling MHD flow and heat transfer equations under harsh nuclear fusion reactor conditions (Ha ~ 104, Gr ~ 1011). Building upon this groundwork, chapter four provides further insights into mixed-convection MHD flows within complex LM blanket geometries under fusion-relevant conditions, showcasing the versatility and computational accuracy of the COMSOL Multiphysics platform, particularly in scenarios surpassing existing experimental and numerical studies.

Subject Added Entry-Topical Term  

Fluid mechanics.

Subject Added Entry-Topical Term  

Nuclear engineering.

Subject Added Entry-Topical Term  

Computational physics.

Subject Added Entry-Topical Term  

Electromagnetics.

Subject Added Entry-Topical Term  

Mechanical engineering.

Index Term-Uncontrolled  

Experimental facility

Index Term-Uncontrolled  

Liquid metal blanket

Index Term-Uncontrolled  

Heat transfer

Index Term-Uncontrolled  

Nuclear fusion reactor

Index Term-Uncontrolled  

Numerical simulation

Index Term-Uncontrolled  

Magnetohydrodynamics

Added Entry-Corporate Name  

University of California, Los Angeles Mechanical Engineering 0330

Host Item Entry  

Dissertations Abstracts International. 85-09B.

Electronic Location and Access  

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Control Number  

joongbu:658141