Abstract
An analysis of the thermal stability of forced-flow cooled superconducting composites has been carried out. Numerical analysis is made mainly of a cable-in-conduit conductor, taking account of the decrease in electric current owing to Joule heat, transient convective heat transfer, transient fluid motion, the temperature- and pressure-dependence of the physical properties of helium, and the dependence of the superconducting composite on temperature and magnetic flux density. The effects of the initial current and the duration of thermal disturbance on the temperature and stability of the superconucting composites are clarified. The conductors run away to the quench or recover into the superconducting state, according as the Joule heating rate in the conductors is greater or smaller than the cooling rate by helium after the termination of thermal disturbance.
