精品文档---下载后可任意编辑ADS 散裂靶系统中多物理场耦合的传热与传质问题讨论中期报告AbstractIn the ADS spallation target system, there exist complex multi-physical field coupling problems in heat transfer and mass transfer. In this study, a mid-term report on the research of these problems is presented.IntroductionAccelerator driven systems (ADS) have become a promising option for nuclear waste transmutation and energy production. In the ADS, the spallation target is a critical component, which generates neutrons through collision with heavy ions. However, the target is subjected to severe material damage due to high-energy particle interaction, and also faces thermal and hydraulic challenges due to the high heat flux and high flow rates. Therefore, the design and operation of the target system need to consider the coupling effects between multiple physical fields, including heat transfer and mass transfer.MethodsThe research is conducted using both numerical simulations and experimental measurements. The numerical simulations are carried out by solving the governing equations of the multi-physical fields, including the Navier-Stokes equations for fluid flow, the energy equation for heat transfer, and the species transport equation for mass transfer. A three-dimensional computational fluid dynamics (CFD) model is developed to simulate the flow and heat transfer in the target. The CFD model is validated using experimental data obtained from the prototype target system.ResultsThe preliminary results show that the multi-physical field coupling effects have significant impacts on the heat transfer and mass transfer in the target system. The fluid flow and heat transfer are strongly affected by the mass transfer between the coolant and the spallation products. The spallation products can accumulate on the target surface and form a 精品文档---下载后可任意编辑porous layer, which reduces the heat transfer efficiency. The mass transfer is also affected by the temperature distribution, which affects the solubility of the spallation products in the coolant.ConclusionThe mid-term report presents the progress of the research on the multi-physical field coupling problems in the ADS spallation target system. The preliminary results indicate that the multi-physical field coupling effects have significant impacts on the heat transfer and mass transfer in the target system, and a comprehensive understanding of these effects is essential for the design and operation of the target system. Further investigations are needed to explore the mechanisms of the multi-physical field coupling effects and to optimize the target system design.
