Study of Flow and Heat Transfer for the Supercritical Hydrogen in Spallation-Type Cylindrical Neutron Moderator
| Autor: | He-Ping Tan, Tianjiao Liang, Lingbo Zhu, Songlin Wang, Yiping Lu, Jianfei Tong, Youlian Lu, Shikui Dong, Chaoju Yu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Control and Optimization Materials science Renewable Energy Sustainability and the Environment Velocity gradient numerical method Energy Engineering and Power Technology Mechanics spallation neutron source Vortex cylindrical neutron moderator supercritical hydrogen Heat transfer Spallation Neutron optimization Electrical and Electronic Engineering Engineering (miscellaneous) Neutron moderator Liquid hydrogen Spallation Neutron Source Energy (miscellaneous) |
| Zdroj: | Energies, Vol 14, Iss 5856, p 5856 (2021) Energies; Volume 14; Issue 18; Pages: 5856 |
| ISSN: | 1996-1073 |
| Popis: | Pipe height in cylindrical neutron moderator is an important factor to flow pattern, temperature distribution and even the neutron characters. In this paper, the steady-state thermal analysis of cold neutron moderator is carrying out with different heights, conjugated heat transfer method and one-way coupled with a neutron transfer software. The different pipe heights, which is the jet-to-surface distances (H/D = 0.5~6), were compared using a 2D moderator model. The results show that vortex size and velocity gradient from container wall to vortex center vary with H/D, the center of recirculation zone nearly remain constant, and heat transfer effect is weakened on the target bottom surface. With H/D increasing, the velocity at bottom target surface is progressively decreased, and cooling effect is poor, leading to the rise in temperature. The optimal range cooling performance is (H/D) = 0.5~1 at Re = 1.7 × 105, and the enhancement of beam power further strengthens the thermal deposition difference between container and liquid hydrogen. The results can be applied to moderator component design and optimization in the future spallation neutron source. |
| Databáze: | OpenAIRE |
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