CAJ | 학술논문

对低压条件下自然循环回路内的两相间歇泉流动不稳定性进行了实验研究。同时，对REL A P5/M OD3.2程序计算低压自然循环间歇泉流动不稳定的可行性进行了验证分析。实验结果表明，低压条件下，间歇泉流动不稳定产生的根本原因在于有效驱动压头的周期性变化，与加热段内气液两相流动的形成-消失周期密切相关。下降段内流体温度越高，波动周期越短。实验数据与REL A P5/M OD3.2程序模拟计算结果符合较好，说明REL A P5/M OD3.2程序对模拟计算低压条件下自然循环间歇泉流动不定稳性具有较好的适用性。
대저압조건하자연순배회로내적량상간헐천류동불은정성진행료실험연구。동시，대REL A P5/M OD3.2정서계산저압자연순배간헐천류동불은정적가행성진행료험증분석。실험결과표명，저압조건하，간헐천류동불은정산생적근본원인재우유효구동압두적주기성변화，여가열단내기액량상류동적형성-소실주기밀절상관。하강단내류체온도월고，파동주기월단。실험수거여REL A P5/M OD3.2정서모의계산결과부합교호，설명REL A P5/M OD3.2정서대모의계산저압조건하자연순배간헐천류동불정은성구유교호적괄용성。
The two-phase geyser flow instability under low pressure natural circulation condition was researched experimentally . Using the experimental data , the RELAP5 code for the simulation geyser flow instability was also verified . The experimental results show that the period variety of effective driving pressure head induces the occurring of flow oscillation phenomena . T he higher the fluid temperature in the dow ncomer is ,the shorter the fluctuation period is .When the fluid temperature reaches saturation value ,the fluctuation period keeps constant .Compared with the experimental data , the calculated magnitude and frequency of the temperature and flow rate oscillations reproduced well . Therefore , the RELAP5/MOD3.2 software is able to model the geyser flow instability under low pressure natural circulation condition .