A comparison between finite element modeling and various thermographic non-destructive testing techniques for the quantification of the thermal integrity of macro-brush plasma facing components used in a tokamak
| Autor: | K. Premjit Singh, Krishnan Balasubramaniam, Yashashri Patil, B. Venkatraman, Md. Shoaib Khan, M. Arafat, Santosh P. Pandya, D. Sharath, Samir S. Khirwadkar, Shwetang N. Pandya, Menaka Murugesan, Jagannathan Govidarajan, D. Krishnan, N. Biju |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Tokamak business.industry Nuclear engineering Heat sink 01 natural sciences Finite element method 010305 fluids & plasmas law.invention Substrate (building) law Mockup Nondestructive testing 0103 physical sciences Service life Brazing business Instrumentation |
| Zdroj: | The Review of scientific instruments. 87(2) |
| ISSN: | 1089-7623 |
| Popis: | The plasma facing components (PFCs) inside a tokamak are typically exposed to extremely high heat flux of the order of MW/m(2). The brazing quality between the plasma facing materials (PFMs) and the heat sink will determine the structural integrity and hence the effective service life of these PFCs. Suitable non-destructive testing (NDT) techniques for the pre-qualification of these components are thus essential to evaluate their structural integrity at various stages of their service life. Macro-brush type mockups of prototype PFCs with graphite as PFM have been inspected for their brazing quality using different active Infrared (IR)-thermographic NDT techniques. The results obtained from these techniques are compared and discussed. The brazing quality was quantified by establishing a comparison between the experimental results and the results from Finite Element Analysis (FEA). The percentage of contact between the PFM and the substrate was varied in FEA. FEA results when compared with experiments shows that tiles have different amounts of contact with the substrate ranging between 10% and 80%. |
| Databáze: | OpenAIRE |
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