Transient heat transfer model for normal zone propagation. Part 1 — theory of a bare helium-cooled superconductor

✍ Scribed by Yu.M. Lvovsky; M.O. Lutset

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 655 KB
• Volume: 22
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(82)90005-4

✦ Synopsis

The paper presents a physical model, involving no adjustable parameters of transient heat transfer for normal zone propagation in a composite helium-cooled superconductor.

Evaluations are given showing that the main contribution to transient heat flux is made by transverse heat conduction in the coolant. When the zone front passes through a fixed point, the temperature at that point increases drastically, a great temperature gradient appears in coolant which results in transient cooling of the superconductor. The zone propagation equation becomes an integro-differential with a convolution integral. The transient heat transfer intensity is characterized by the introduced dimensionless parameter e.

The problem has been solved analytically for the model with constant coefficients and jump-wise heat release. Formulae have been obtained for the propagation and recovery velocities describing the effect of transient heat transfer (via parameter e).