Numerical analysis of supersonic jet flow and dust transport induced by air ingress in a fusion reactor
文献类型：期刊论文
| 作者 | Wang, Bu-Er1,2; Zhang, Shi-Chao2; Wang, Zhen2 ; Jia, Jiang-Tao2; Chen, Zhi-Bin2
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| 刊名 | NUCLEAR SCIENCE AND TECHNIQUES
 |
| 出版日期 | 2021-07-01 |
| 卷号 | 32 |
| 关键词 | Supersonic jet Radioactive dust Loss of vacuum accident Mach disk Friction velocity |
| ISSN号 | 1001-8042 |
| DOI | 10.1007/s41365-021-00912-z |
| 通讯作者 | Zhang, Shi-Chao(shichao.zhang@inest.cas.cn) ; Wang, Zhen(zhen.wang@inest.cas.cn) |
| 英文摘要 | During a loss of vacuum accident (LOVA), the air ingress into a vacuum vessel (VV) may lead to radioactive dust resuspension, migration, and even explosion, thereby posing a great threat to the safe operation of future fusion reactors; thus, it is crucial to understand the flow characteristics and radioactive dust transport behavior induced by LOVA. However, only a few studies have identified the characteristics of the highly under-expanded jet flow at a scale of milliseconds during LOVA. Particularly, the occurrence and behavior of a Mach disk is yet to be captured in existing studies. In this study, we used a more advanced model with a finer mesh and adaptive mesh strategies to capture the Mach disk in a VV during LOVA. In detail, a computational fluid dynamics-discrete phase model one-way coupled multiphase approach was established using the computational fluid dynamics code ANSYS FLUENT and applied to the analysis during the first seconds of LOVA. The results showed that air ingress into the VV behaved like a highly free under-expanded jet at the initial stage and Mach disk was formed at similar to 6 ms. Moreover, the flow field dramatically changed at the position of the Mach disk. The jet core before the Mach disk had a maximum velocity of similar to 8 Mach with the corresponding lowest static pressure (similar to 100 Pa) and temperature (few tens of K). The friction velocities in the lower part of the VV, which is an area of concern due to dust deposition, were generally larger than 15 m/s near the inlet region. Lastly, the crude prediction of the particle trajectories demonstrated the spiral trajectories of the dust following the air motion. Therefore, this study provided a basis for further safety analysis and accident prevention related to dust transport and explosion in future fusion reactors. |
| WOS关键词 | VACUUM ACCIDENT ; RESUSPENSION ; DEVICES ; FIELD ; LOVA |
| 资助项目 | National Natural Science Foundation of China[51906249] ; National Key R&D Program of China[2019YFE0191600] ; President Foundation of Hefei Institute of Physical Science, Chinese Academy of Sciences[YZJJ2019QN21] |
| WOS研究方向 | Nuclear Science & Technology ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000673983000001 |
| 出版者 | SPRINGER SINGAPORE PTE LTD |
| 资助机构 | National Natural Science Foundation of China ; National Key R&D Program of China ; President Foundation of Hefei Institute of Physical Science, Chinese Academy of Sciences |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/123275]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Zhang, Shi-Chao; Wang, Zhen |
| 作者单位 | 1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Nucl Energy Safety Technol, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Bu-Er,Zhang, Shi-Chao,Wang, Zhen,et al. Numerical analysis of supersonic jet flow and dust transport induced by air ingress in a fusion reactor[J]. NUCLEAR SCIENCE AND TECHNIQUES,2021,32. |
| APA | Wang, Bu-Er,Zhang, Shi-Chao,Wang, Zhen,Jia, Jiang-Tao,&Chen, Zhi-Bin.(2021).Numerical analysis of supersonic jet flow and dust transport induced by air ingress in a fusion reactor.NUCLEAR SCIENCE AND TECHNIQUES,32. |
| MLA | Wang, Bu-Er,et al."Numerical analysis of supersonic jet flow and dust transport induced by air ingress in a fusion reactor".NUCLEAR SCIENCE AND TECHNIQUES 32(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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