Study of Flow and Heat Transfer for the Supercritical Hydrogen in Spallation-Type Cylindrical Neutron Moderator

Jianfei Tong, Lingbo Zhu, Yiping Lu, Tianjiao Liang, Youlian Lu, Songlin Wang, Chaoju Yu, Shikui Dong and Heping Tan
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Jianfei Tong: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Lingbo Zhu: Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Yiping Lu: Department of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin 150001, China
Tianjiao Liang: Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Youlian Lu: Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Songlin Wang: Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Chaoju Yu: Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Shikui Dong: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Heping Tan: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Energies, 2021, vol. 14, issue 18, 1-20

Abstract: 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 × 10 5 , 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.

Keywords: spallation neutron source; cylindrical neutron moderator; optimization; numerical method; supercritical hydrogen (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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