General formulas for the adiabatic propagation velocity of the normal zone
The influence on the propagation velocity of the normal zone of four phenomena was investigated: The temperature dependence of the specific heat and the thermal conductivity, the current-sharing zone, the electromagnetic diffusion of current through a possible super-stabilizer, and the thermal diffusion through a possible insulator. At the beginning, these influences were studied independently of each other. In all cases, after creating a model of the particular phenomenon, the equations of thermal and electromagnetic behavior were solved analytically and the expressions for the propagation velocity obtained. These expressions were then put into nondimensional forms, which have allowed us to define four correction factors taking into account the studied influences, depending only on one or two nondimensional parameters. Subsequent studies were made to investigate how to combine these correction factors in order to obtain general formulas for the velocity, taking into account a part or all of these influences. A review is presented here of these formulas, which are of interest for the superconducting windings, where the heat transfer to helium can be neglected on the time scale of the quench process.
- Research Organization:
- 9521157
- OSTI ID:
- 5916978
- Report Number(s):
- CONF-880812-
- Journal Information:
- IEEE Trans. Magn.; (United States), Vol. 25:2; Conference: Applied superconductivity conference, San Francisco, CA, USA, 21 Aug 1988
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
42 ENGINEERING
SUPERCONDUCTING COILS
THERMAL CONDUCTIVITY
SUPERCONDUCTIVITY
CALCULATION METHODS
ADIABATIC COMPRESSION HEATING
DIFFUSION
ELECTROMAGNETIC PULSES
EQUATIONS
HEAT TRANSFER
HELIUM
QUENCHING
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY TRANSFER
FLUIDS
GASES
HEATING
NONMETALS
PHYSICAL PROPERTIES
PLASMA HEATING
PULSES
RADIATIONS
RARE GASES
THERMODYNAMIC PROPERTIES
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656100 - Condensed Matter Physics- Superconductivity
420400 - Engineering- Heat Transfer & Fluid Flow