Oscillation of Thermal Interface in Hot Plenum of Fast Breeder Reactor

快中子增殖堆热室中热界面的振荡

• 批准号: 61460243
• 负责人: MADARAME Haruki
• 金额: $ 1.86万
• 依托单位: THE UNIVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61460243/
• 关键词: Fast Breeder Reactor; Thermal Stratification; Fluid Vibration; Self-Induced Vibration; Entrainment; Buoyant Force; Hot Plenum; 温度成層界面

When a low temperature fluid flows into the bottom of a tank filled with a high temperature fluid, thermal stratification occurs because of differences in density. After a scram of a fast breeder reactor, the outlet temperature of the reactor coolant falls quickly, and a thermal interface appears in the hot plenum.Oscillation of the interface was observed in thermal-hydraulic tests with water as a simulant coolant. The characteristics of the oscillation were examined, and an analytical model was proposed which explained the mechanism of the oscillation groth. The low density fluid was entrained by the high density fluid flow and was sucked down periodically. The buoyant force of the sucked fluid supplied energy to the oscillation if it is in phase with the upward movement of the oscillating interface. Therefore the oscillation grows in the case the high density fluid velocity is low in comparison with the oscillation period. The analytical results for the range of oscillation growth agreed well with the experimental results.

当低温流体流入填充有高温流体的罐的底部时，由于密度的差异而发生热分层。快中子增殖反应堆在紧急停堆后，反应堆冷却剂出口温度迅速福尔斯，在热腔室中出现热界面，在以水为模拟冷却剂的热工水力试验中观察到界面振荡现象。研究了振荡的特性，并提出了一个分析模型，解释了振荡增长的机理。低密度流体被高密度流体流夹带并被周期性地向下抽吸。如果吸入流体的浮力与振荡界面的向上运动同相，则吸入流体的浮力为振荡提供能量。因此，在高密度流体速度与振荡周期相比较低的情况下，振荡增长。对振荡增长范围的分析结果与实验结果吻合较好。

项目成果

班芽春樹: 日本機械学会論文集C編. 53. 2502-2509 (1987)

Haruki Banme：日本机械工程师学会会议录，C 版 53. 2502-2509 (1987)。

Haruki,Madarame: "Self-Induced Oscillation of Thermal Interface" Transactions of the Japan Society of Mechanical Engineers (Series C). 53. 2502-2509 (1987)

Haruki,Madarame：“热界面的自致振荡”日本机械工程师学会会刊（C 系列）。

班目春樹: 日本機械学会論文集 C編.

Haruki Madarame：日本机械工程师学会会议录，C 版。