An Investigation of Multiple Stability of Forced-Flow Cooled Conductors. Mechanism and Influence of Heat Transfer of Multiple Stability.

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  • 強制冷却式超電導導体の多重安定性に関する研究　発生メカニズムと熱伝達率の影響
  • キョウセイ レイキャクシキ チョウデンドウ ドウタイ ノ タジュウ アンテイセ

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Abstract

Concerning the behavior of stability margins of forced-flow cooled conductors, it is known experimentally that the multiple stability margins for certain combinations of operation current, magnetic field, ambient helium pressure and externally imposed helium flow appear. This work is a study of the mechanism of multiple stability and of the influence of heat transfer on multiple stability margins by means of our own numerical code. It is obvious that the multiple stability margins of forced-flow cooled conductors are due to the interaction between enhancement of heat transfer by heating-induced flow and increase of temperatures of conductors and ambient helium. Also, it has been possible to give a qualitative explication of the complex multiple behavior of the stability margins using only the steady state heat transfer formula and to give a quantitative explication of that using both transient and steady-state heat transfer formulae.

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