Investigation on reduced thermal models for simulating infrared images in fusion devices
Résumé
In fusion facilities, the in-vessel wall receives high heat flux density up to 20 MW/m 2. The monitoring of in-vessel components is usually ensured by infra-red (IR) thermography but with all-metallic walls, disturbance phenomenon as reflections may lead to inaccurate temperature estimates, potentially endangering machine safety. A full predictive photonic simulation is then used to assess accurately the IR measurements. This paper investigates some reduced thermal models (semi-infinite wall, thermal quadrupole) to predict the surface temperature from the particle loads on components for a given plasma scenario. The results are compared with a reference 3D Finite Element Method (Ansys Mechanical) and used as input for simulating IR images. The performances of reduced thermal models are analysed by comparing the resulting IR images.
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Gerardin_2016_J._Phys.__Conf._Ser._745_032019.pdf (1.32 Mo)
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