Transient Heat Transfer of Supercritical Helium in High Centrifugal Acceleration Field
Transient heat transfer of supercritical helium in centrifugal acceleration field has been measured for studying the stability characteristics of superconducting rotor windings of a superconducting generator. A temperature resistive platinum-0.5% cobalt (Pt-Co) thin wire, having small heat mass, was used as a temperature sensor and heater to measure the heat transfer characteristics. It was observed that the steady state heat transfer of supercritical helium in 3600G (G; gravity acceleration) was established in 200μsec. In the paper, data of transient heat transfer of supercritical helium in centrifugal acceleration field are shown and their specific characteristics are studied comparing with those of liquid helium.
KeywordsHeat Transfer Rayleigh Number Liquid Helium Heat Transfer Characteristic Supercritical State
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