Large eddy simulation of unsteady flow in gas-liquid separator applied in thorium molten salt reactor

doi:10.1007/s41365-018-0411-3

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	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
ISSN	1001-8042
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
DOI	10.1007/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
推荐引用方式 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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