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SUMMARY:Multiphysics Finite Element Modelling of “close-to-real” coil
winding of a Toroidal Field Coil in a Tokamak
DTSTART;VALUE=DATE-TIME:20210922T115000Z
DTEND;VALUE=DATE-TIME:20210922T121500Z
DTSTAMP;VALUE=DATE-TIME:20220122T150839Z
UID:indico-contribution-450@indico.iter.org
DESCRIPTION:Finite Element Modelling (FEM) is the common practice for the
design and performance evaluation of superconducting magnets. Electromagne
tic models are combined with structural ones to first compute the forces t
hat are applied to the magnet during its operation and then evaluate the s
tress distribution that is attained in its subcomponents. Due to the compu
tational size of the global problem\, a simplified configuration of the co
il winding is usually implemented in the models: the coil is not modelled
as a continuous wound cable\, but each of its turns is a closed loop posit
ioned in a grid to recreate the section and global geometry of the magnet.
This results in a uniform distribution of the current in all the magnet s
ections and does not account for the electromagnetic effects in correspond
ence of the winding and layer jumps and of the coil terminations. This pap
er discusses the FEM procedure that has been developed with Ansys APDL to
include these details in the 3-dimensional (3D) electromagnetic and struct
ural model of a Toroidal Field Coil system (TFC) of a Tokamak. We evaluate
d the effect of implementing a “close-to-real” winding pack and compar
ed the results with those from an ideal model\, both in terms of electroma
gnetic field generated and stress levels in the magnet. In addition\, we s
how how the detailed force distribution computed can be exploited as an in
put for structural sub-models to evaluate stress conditions in corresponde
nce of the winding and layer jumps and of the coil terminations. This work
has been completed as part of the EUROfusion roadmap to fusion energy in
the framework of the development of the Divertor Tokamak Test facility (DT
T) currently under construction at the ENEA Research Center of Frascati\,
Italy.\n\nhttps://indico.iter.org/event/5/contributions/450/
LOCATION:Virtual
URL:https://indico.iter.org/event/5/contributions/450/
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