低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
超電導発電機用界磁巻線の安定性
樋口 登大西 利只海保 勝之野村 晴彦石井 格立石 裕名取 尚武関根 聖治新井 和昭木村 錫一熊谷 幹夫饗庭 敏之
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1991 年 26 巻 6 号 p. 502-507

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Stabilities and heat flux in liquid helium in a high gravitational field up to 2, 000G at a rotating speed of 3, 600rpm, are studied to establish the fundamental design criterion of field windings of superconducting generators. It is clarified that magnet stability is greatly improved in a rotational field compared with stationary state, because of the enhancement of natural convection for the cooling of the coils caused by a high gravity. The heat transfer coefficient measured from a copper surface to liquid helium is 0.75×104Wm-2K-1 at about 1, 000G, and it is identical to the calculated value based on the normal zone propagation velocity under the same condition.

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