| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1507690 | Cryogenics | 2013 | 6 Pages |
The high field magnet (HFM) project, within the European project EuCARD, aims at constructing an Nb3Sn high field accelerator magnet, the Fresca 2 magnet. This magnet is to serve as a test bed for future high field magnets and to upgrade the vertical CERN cable test facility. Fresca 2 is a block coil type magnet designed to produce 13 T at 1.9 K. To calculate the temperature margin and the evolution of the temperature due to a quench event within the magnet, we developed a 3D model implemented in ANSYS-CFX® software. This model is an extension of the 2D simplified “two-fluid model” proposed by Kitamura et al. with conjugate heat transfer and Kapitza resistance. This model is derived from the original two-fluid model and consisted of a conventional continuity equation, a modified momentum equation for the total fluid and an energy equation including the Gorter-Mellink internal convection term modeling the turbulence regime. The paper presents the model, the numerical schemes, the assumptions taken for the calculations and the results of the simulation obtained for the temperature evolution due to AC losses and due to quench heating within the magnet structure.
► We have implemented a simplified version of the two-fluid model in ANSYS CFX. ► This model was benchmarked against the 1D steady-state analytical solution. ► We used the model to determine the temperature margin on a Nb3Sn magnet due to AC losses. ► We performed transient calculation to reproduce the quench protection heating scenario.
