Parametric study of density wave instability in parallel channels of a water-cooled blanket in a fusion reactor
In fusion reactors, many blanket concepts are designed with water as a coolant to transfer high-density heat from the fusion reaction out of the reactor core. The coolant temperature and pressure are maintained as the validated use in water-cooled fission reactors. However, the flow channel in a wat...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-09-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1251233/full |
| _version_ | 1797692517633753088 |
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| author | Qiang Lian Qiang Lian Qiang Lian Yu Liang Haoyu Liao Simiao Tang Simiao Tang Simiao Tang Luteng Zhang Luteng Zhang Zaiyong Ma Zaiyong Ma Wan Sun Wan Sun |
| author_facet | Qiang Lian Qiang Lian Qiang Lian Yu Liang Haoyu Liao Simiao Tang Simiao Tang Simiao Tang Luteng Zhang Luteng Zhang Zaiyong Ma Zaiyong Ma Wan Sun Wan Sun |
| author_sort | Qiang Lian |
| collection | DOAJ |
| description | In fusion reactors, many blanket concepts are designed with water as a coolant to transfer high-density heat from the fusion reaction out of the reactor core. The coolant temperature and pressure are maintained as the validated use in water-cooled fission reactors. However, the flow channel in a water-cooled blanket is independent of each other, and there is no flow mixing between coolant channels. Therefore, flow instability may occur in the independent parallel channels in a water-cooled blanket due to its unique structure and heat distribution, especially under the high heat flux caused by plasma rupture. In this study, the parametric analysis of density wave instability is performed using a thermal-hydraulic code developed for independent parallel channels based on the homogeneous model for the two-phase flow. The parallel-channel system in a water-cooled ceramic breeder (WCCB) blanket of the China Fusion Engineering Experimental Reactor (CFETR) is established for its first wall structure. A small disturbance is introduced into the system to determine if it is stable under different conditions. It is found that the channel number has no obvious influence on the prediction of the flow instability boundary. Therefore, the two-channel system is adopted to investigate the influence of different parameters, such as the pressure, resistance, flow rate, and inclination, on the flow instability boundary of the parallel-channel system in the CFETR WCCB blanket. The results show that flow instability occurs more easily in this study compared to the traditional instability analysis, especially under high-pressure conditions. In general, conditions of high pressure, large flow rate, and no inclination can stabilize the system, while the influence of resistance is quite different under different conditions of resistance and pressure. The research work indicates that more attention should be paid to the joint influence of different parameters for the water-cooled blanket during its design and operation. |
| first_indexed | 2024-03-12T02:29:45Z |
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| id | doaj.art-2e563631421e442d85e0a3e7e7352d68 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-03-12T02:29:45Z |
| publishDate | 2023-09-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Energy Research |
| spelling | doaj.art-2e563631421e442d85e0a3e7e7352d682023-09-05T09:10:12ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-09-011110.3389/fenrg.2023.12512331251233Parametric study of density wave instability in parallel channels of a water-cooled blanket in a fusion reactorQiang Lian0Qiang Lian1Qiang Lian2Yu Liang3Haoyu Liao4Simiao Tang5Simiao Tang6Simiao Tang7Luteng Zhang8Luteng Zhang9Zaiyong Ma10Zaiyong Ma11Wan Sun12Wan Sun13Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, ChinaDepartment of Nuclear Engineering and Technology, Chongqing University, Chongqing, ChinaPostdoctoral Station of Power Engineering and Engineering Thermophysics, Chongqing University, Chongqing, ChinaNuclear Power Institute of China, Chengdu, ChinaNuclear Power Institute of China, Chengdu, ChinaKey Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, ChinaDepartment of Nuclear Engineering and Technology, Chongqing University, Chongqing, ChinaPostdoctoral Station of Power Engineering and Engineering Thermophysics, Chongqing University, Chongqing, ChinaKey Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, ChinaDepartment of Nuclear Engineering and Technology, Chongqing University, Chongqing, ChinaKey Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, ChinaDepartment of Nuclear Engineering and Technology, Chongqing University, Chongqing, ChinaKey Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, ChinaDepartment of Nuclear Engineering and Technology, Chongqing University, Chongqing, ChinaIn fusion reactors, many blanket concepts are designed with water as a coolant to transfer high-density heat from the fusion reaction out of the reactor core. The coolant temperature and pressure are maintained as the validated use in water-cooled fission reactors. However, the flow channel in a water-cooled blanket is independent of each other, and there is no flow mixing between coolant channels. Therefore, flow instability may occur in the independent parallel channels in a water-cooled blanket due to its unique structure and heat distribution, especially under the high heat flux caused by plasma rupture. In this study, the parametric analysis of density wave instability is performed using a thermal-hydraulic code developed for independent parallel channels based on the homogeneous model for the two-phase flow. The parallel-channel system in a water-cooled ceramic breeder (WCCB) blanket of the China Fusion Engineering Experimental Reactor (CFETR) is established for its first wall structure. A small disturbance is introduced into the system to determine if it is stable under different conditions. It is found that the channel number has no obvious influence on the prediction of the flow instability boundary. Therefore, the two-channel system is adopted to investigate the influence of different parameters, such as the pressure, resistance, flow rate, and inclination, on the flow instability boundary of the parallel-channel system in the CFETR WCCB blanket. The results show that flow instability occurs more easily in this study compared to the traditional instability analysis, especially under high-pressure conditions. In general, conditions of high pressure, large flow rate, and no inclination can stabilize the system, while the influence of resistance is quite different under different conditions of resistance and pressure. The research work indicates that more attention should be paid to the joint influence of different parameters for the water-cooled blanket during its design and operation.https://www.frontiersin.org/articles/10.3389/fenrg.2023.1251233/fullflow instabilityparallel channelswater-cooled blanketfusion reactorparametric analysis |
| spellingShingle | Qiang Lian Qiang Lian Qiang Lian Yu Liang Haoyu Liao Simiao Tang Simiao Tang Simiao Tang Luteng Zhang Luteng Zhang Zaiyong Ma Zaiyong Ma Wan Sun Wan Sun Parametric study of density wave instability in parallel channels of a water-cooled blanket in a fusion reactor Frontiers in Energy Research flow instability parallel channels water-cooled blanket fusion reactor parametric analysis |
| title | Parametric study of density wave instability in parallel channels of a water-cooled blanket in a fusion reactor |
| title_full | Parametric study of density wave instability in parallel channels of a water-cooled blanket in a fusion reactor |
| title_fullStr | Parametric study of density wave instability in parallel channels of a water-cooled blanket in a fusion reactor |
| title_full_unstemmed | Parametric study of density wave instability in parallel channels of a water-cooled blanket in a fusion reactor |
| title_short | Parametric study of density wave instability in parallel channels of a water-cooled blanket in a fusion reactor |
| title_sort | parametric study of density wave instability in parallel channels of a water cooled blanket in a fusion reactor |
| topic | flow instability parallel channels water-cooled blanket fusion reactor parametric analysis |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1251233/full |
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