Thermal analysis of composite superconductors subjected to time-dependent disturbances |
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| Authors: | S Y Seol Y S Cha W J Minkowycz |
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| Institution: | (1) Chonnam National University Department of Mechanical Engineering 300 Yongbongdong Kwangju 500-757, Korea, KR;(2) Argonne National Laboratory Energy Technology Division 9700 S. Cass Avenue, Argonne, IL 60439, USA, US;(3) The University of Illinois at Chicago Department of Mechanical Engineering, MC 251 842 W. Taylor Street, Chicago, IL 60607-7022, USA, US |
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| Abstract: | A one-dimensional heat conduction equation with time- and temperature-dependent heat sources was employed to study the steady-state
and transient response of a composite superconductor subjected to a thermal disturbance. An integral formulation was used
to solve the steady-state problem of current redistribution and heat generation. The results of the integral formulation are
compared with those of an analytical solution. The two solutions agree with each other except when the analytical solution
fails as the temperature in the superconductor begins to exceed the critical temperature. Transient solutions were obtained
by the finite-difference technique and the results are compared with a known analytical solution. Results of numerical calculations
of the transient response of a composite superconductor subjected to an initial pulsed disturbance are presented. It is demonstrated
that the superconductor can switch between the superconducting and the current-sharing state. The transient response and the
stability of the composite conductor depend on the magnitude and duration of the disturbance, the dimensionless temperature
θ*, and the dimensionless parameter φ.
Received on 18 November 1996 |
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