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Heat Transfer Research
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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v28.i4-6.60
pages 259-265

Dynamic Stability of a HTSC-Sample in Liquid Nitrogen

V. I. Deev
Moscow Engineering and Physics Institute (State University), Moscow
V. S. Kharitonov
Moscow Engineering and Physics Institute (State University), Moscow
K. V. Kutsenko
Moscow Engineering and Physics Institute (State University), Moscow
S. A. Voronkov
Moscow State Engineering Physics Institute (Technical University) 115409, Moscow, Russia Moscow Institute of Steel and Alloys 117936, Moscow, Russia
A. A. Lavrukhin
Moscow Engineering and Physics Institute (State University), Moscow
A. O. Komarov
Moscow State Engineering Physics Institute (Technical University) 115409, Moscow, Russia Moscow Institute of Steel and Alloys 117936, Moscow

ABSTRAKT

The dynamic stability of a (high temperature super conductor) HTSC-sample in a pool of liquid nitrogen under stepwise current inputs has been experimentally studied. The estimation of minimum nonstationary critical heat flux was conducted. In the event of a heat transfer crisis fast temperature rise would occur and thermal cracking of the sample due to large temperature gradient would result. Instabilities were observed in the heat transfer associated with the small thermal disturbances. These unstable heat transfer regimes are accompanied by large temperature overshoots.


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