Title :
Numerical analysis of stability margin and quench behavior of cable-in-conduit NbTi conductors for KSTAR
Author :
Wang, Q.L. ; Oh, S.S. ; Ryu, K.S. ; Yoon, C.S. ; Kim, K.M.
Author_Institution :
Korea Electrotechnol. Res. Inst., Changwon, South Korea
fDate :
6/1/1999 12:00:00 AM
Abstract :
A numerical model has been proposed to analyze the stability margin and quench characteristics of the cable-in-conduit NbTi conductors for the KSTAR-PF (Korea Superconducting Tokamak Advanced Research) magnets. The dependence of the thermal, hydraulic and electrical properties on the external thermal disturbance was investigated. The algorithm of the program is based on the finite volume method which adopts space discretization and time integration by multi-step Runge-Kutta method to obtain stable numerical solutions. It was confirmed that the disturbance duration can influence the conductor stability and limiting current.
Keywords :
Runge-Kutta methods; Tokamak devices; niobium alloys; stability; superconducting cables; superconducting magnets; titanium alloys; KSTAR; Korea Superconducting Tokamak Advanced Research; NbTi; cable-in-conduit NbTi conductors; conductor stability; disturbance duration; electrical properties; external thermal disturbance; finite volume method; hydraulic properties; limiting current; multi-step Runge-Kutta method; poloidal field magnets; quench behavior; space discretization; stability margin; stable numerical solutions; thermal properties; time integration; Conductors; Magnetic analysis; Niobium compounds; Numerical analysis; Numerical models; Numerical stability; Stability analysis; Superconducting cables; Superconducting magnets; Titanium compounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
