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Topology optimization on vortex-type passive fluidic diode for advanced nuclear reactors

Title
Topology optimization on vortex-type passive fluidic diode for advanced nuclear reactors
Author
송민섭
Keywords
Vortex-type fluidic diode; Topology optimization; CFD; Flow visualization
Issue Date
2019-08
Publisher
KOREAN NUCLEAR SOC
Citation
NUCLEAR ENGINEERING AND TECHNOLOGY, v. 51, no. 5, page. 1279-1288
Abstract
The vortex-type fluidic diode (FD) is a key safety component for inherent safety in various advanced reactors such as the sodium fast reactor (SFR) and the molten salt reactor (MSR). In this study, topology optimization is conducted to optimize the design of the vortex-type fluidic diode. The optimization domain is simplified to 2-dimensional geometry for a tangential port and chamber. As a result, a design with a circular chamber and a restrictor at the tangential port is obtained. To verify the new design, experimental study and computational fluid dynamics (CFD) analysis were conducted for inlet Reynolds numbers between 2000 and 6000. However, the results show that the performance of the new design is no better than the original reference design. To analyze the cause of this result, detailed analysis is performed on the velocity and pressure field using flow visualization experiments and 3-D CFD analysis. The results show that the discrepancy between the optimization results in 2-D and the experimental results in 3-D originated from exclusion of an important pressure loss contributor in the optimization process. This study also concludes that the junction design of the axial port and chamber offers potential for improvement of fluidic diode performance.
URI
https://www.sciencedirect.com/science/article/pii/S1738573318307307?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/177668
ISSN
1738-5733
DOI
10.1016/j.net.2019.03.018
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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