Propagation Velocity of the Normal Zone in a Cable-in-Conduit Conductor

Ando, T.; Nishi, M.; Kato, Takashi; Yoshida, Jun; Ito, Naoki; Shimamoto, S.

doi:10.1007/978-1-4613-0639-9_83

Cited by 21 publications

(14 citation statements)

References 1 publication

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“…The numerical results will be compared to those obtained by the commercial finite-element code GANDALF. Second, an experiment by Ando et al [22] will be used to benchmark our numerical simulation.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…The second benchmarking experiment was chosen from Ando et al [22], in which a short NbTi superconductor coil was used. A quench was initiated with a fast heat pulse by a heater that was added for 0.1 ms in a 4-mm zone of a 26-m dummy coil.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…The numerical results by DG-SEM and the GANDALF code were compared to the same experimental data [22]. The GANDALF code uses linear finite elements, for a second-order spatial approximation, and either a first-or second-order approximation in time [23].…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Discontinuous Galerkin Spectral Element Simulation of a Thermal-Hydraulic Problem in Superconducting Magnets

Mao¹,

Luongo²,

Kopriva³

2006

Numerical Heat Transfer, Part A: Applications

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In this article we simulate one-dimensional quench propagation in superconducting magnets using cable-in-conduit conductors (CICCs) by a discontinuous Galerkin (DG) spectral element method (SEM) and explicit Runge-Kutta time integration. The supercritical helium flow in the CICC channel can be described by the Euler equations with an additional friction force and coupled heat transfer among the helium, the conductor, and the conduit. Roe's approximate Riemann solver for a real gas=fluid is used to compute numerical flux, and a nonreflecting boundary condition is introduced for the approximation of the outflow boundary condition. The method used here is highly parallelizable. Some numerical results are given and compared with those obtained by a finite-element method and with experimental data. This method shows high robustness to simulate the thermal-hydraulic problem with large nonlinear source terms.

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Numerical Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Discontinuous Galerkin Spectral Element Simulation of a Thermal-Hydraulic Problem in Superconducting Magnets

Mao¹,

Luongo²,

Kopriva³

2006

Numerical Heat Transfer, Part A: Applications

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“…(4) Based on the measured 2, this condition was not met in either the 800-A or the 400-A shot conditions, and the disparity is worse in the latter shot. Applying Eqs.…”

Section: Z / C >> ~(~C a T / C ' ) ) ' /~( D /~~L > ' /~mentioning

confidence: 95%

Quench propagation in a cable-in-conduit force-cooled superconductor-preliminary results

1991

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Experimental SetupCable-in-conduit force-cooled superconductor is being considered for use in a superconducting magnetic energy storage (SMES) system. The quench behavior of such a conductor plays a very important role in the protection of this system and of other magnets having similar cooling environments. In particular, the existence of the thermohydraulic quenchback effect predicted recently by numerical analysis and theoretical calculation has been investigated experimentally. The test sample consists of a 50-m-long single triplex NbTi superconductor enclosed in a stainless steel conduit. Heaters 0.2 to 8 m long are provided both at the center and at one end of the sample, and the heated end can be closed off to simulate quenching centered in a 100-mlong conductor. The quench behavior of the conductor (e.g., the propagation velocity and the temperature profile) was measured as a function of initial normal zone length, conductor current density, helium temperature, etc. This paper reports the test results and the comparison with the predictions.

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“…A calibration of the current quench code "Solxport3D-Quench" against Ando's test results [6] against Ando's test results in Fig. 5.…”

Section: Calibrationmentioning

confidence: 99%

A Thermohydraulic-Quenching Code for Superconducting Magnets in Network Circuits

Feng¹,

Schultz²,

Minervini³

2010

AIP Conference Proceedings

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A thermohydraulic-quench code "Solxport3D-Quench" has been developed for a system of superconducting and normal solenoid magnets with supply network circuits. Each power supply network circuit consists of at least one superconducting magnet with parallel circuits including voltage sources, resistors or diodes. When used for analysis of a magnetic confinement fusion device, the plasma currents and passive structure eddy currents are also included in all scenarios. The simulation starts from superconducting stage for each magnet coil. The superconducting stage switches to quench stage if any one of the superconducting magnets quenches (i.e., exceeding the current sharing temperature.) It is followed by the dumping stage after a given quench detection time. The recovery of the superconducting stage is allowed at any time step before dumping. The currents of each magnetic coil are calculated by a time-difference method. The thermohydraulic parameters during superconducting and quench/dumping stage are obtained by a finite element method. The size and location of each finite element are dynamically defined at each time step during quench and dumping. Calibrations against test data are presented.

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Propagation Velocity of the Normal Zone in a Cable-in-Conduit Conductor

Cited by 21 publications

References 1 publication

Discontinuous Galerkin Spectral Element Simulation of a Thermal-Hydraulic Problem in Superconducting Magnets

Discontinuous Galerkin Spectral Element Simulation of a Thermal-Hydraulic Problem in Superconducting Magnets

Quench propagation in a cable-in-conduit force-cooled superconductor-preliminary results

A Thermohydraulic-Quenching Code for Superconducting Magnets in Network Circuits

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