2013 Fiscal Year Final Research Report
Development of an Innovative Divertor Cooling Method Utilizing Self-forming Flow Field in Multi-elbow Piping
| Project/Area Number |
24656555
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Nuclear fusion studies
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | ダイバータ冷却 / エルボ配管 / 旋回流 / 流れの可視化 |
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| Research Abstract |
In this study, characteristics of swirling flows induced downstream of multi-elbow piping layouts were minutely analyzed by means of flow visualization experiments, and potentially suitable piping layouts were selected for divertor cooling as an alternative to the flow field induced by a swirl tube. First, the influence of curvature radius of the elbow was estimated by using a dual-elbow layout in which two elbows were connected three-dimensionally. And it was found that the shorter the curvature radius was, the stronger the swirling flow became. Subsequently, five three-elbow layouts comprising three short elbows were tested, and a 3D-3D layout, in which the first and second elbows and the second and third elbows were connected three-dimensionally, respectively, gave the most strong swirling flow. On the other hand, turbulent statistics such as turbulent energy became largest in the dual elbow layout. These layout will be tested in terms of heat transfer in the next step.
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