チムニを有する沸騰自然循環ループの不安定流動に関する研究 第3報 比較的高圧下における不安定流動

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  • Thermal-Hydraulic Instability of Boiling Natural Circulation Loop with a Chimney. 3rd Report. Instability at High System Pressure.
  • チムニ オ ユウスル フットウ シゼン ジュンカン ループ ノ フアンテイ リ

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Experiments have been conducted to investigate thermal-hydraulic instabilities at system pressure ranging from 1 to 7.2 MPa in a boiling natural circulation loop with a chimney. Stability maps in reference to the system pressure, the channel inlet subcooling, and heat flux are presented. Two different types of instabilities were observed in the facility at relatively low and high system pressures. Both of the instability mechanisms were clarified by investigation of the transient flow pattern and the response of the driving force of the circulation to momentum energy.

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