Large eddy simulation of unsteady flow in gas-liquid separator applied in thorium molten salt reactor
Li, JJ; Qian, YL; Yin, JL; Li, H; Liu, W; Wang, DZ
2018
发表期刊NUCLEAR SCIENCE AND TECHNIQUES
ISSN1001-8042
卷号29期号:5页码:-
文章类型期刊论文
摘要Axial gas-liquid separators have been adopted in fission gas removal systems for the development of thorium molten salt reactors. In our previous study, we observed an unsteady flow phenomenon in which the flow pattern is directly dependent on the backpressure in a gas-liquid separator; however, the underlying flow mechanism is still unknown. In order to move a step further in clarifying how the flow pattern evolves with a variation in backpressure, a large eddy simulation (LES) was adopted to study the flow field evolution. In the simulation, an artificial boundary was applied at the separator outlet under the assumption that the backpressure increases linearly. The numerical results indicate that the unsteady flow feature is captured by the LES approach, and the flow transition is mainly due to the axial velocity profile redistribution induced by the backpressure variation. With the increase in backpressure, the axial velocity near the downstream orifice transits from negative to positive. This change in the axial velocity sign forces the unstable spiral vortex to become a stable recti- linear vortex.
关键词Cylindrical Cyclones Swirling Flow Air-core Vortices
DOI10.1007/s41365-018-0411-3
收录类别SCI
语种英语
WOS记录号WOS:000433263600002
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29059
专题中科院上海应用物理研究所2011-2018年
作者单位1.Li, JJ
2.Qian, YL
3.Yin, JL
4.Li, H
5.Liu, W
6.Wang, DZ
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GB/T 7714
Li, JJ,Qian, YL,Yin, JL,et al. Large eddy simulation of unsteady flow in gas-liquid separator applied in thorium molten salt reactor[J]. NUCLEAR SCIENCE AND TECHNIQUES,2018,29(5):-.
APA Li, JJ,Qian, YL,Yin, JL,Li, H,Liu, W,&Wang, DZ.(2018).Large eddy simulation of unsteady flow in gas-liquid separator applied in thorium molten salt reactor.NUCLEAR SCIENCE AND TECHNIQUES,29(5),-.
MLA Li, JJ,et al."Large eddy simulation of unsteady flow in gas-liquid separator applied in thorium molten salt reactor".NUCLEAR SCIENCE AND TECHNIQUES 29.5(2018):-.
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