基于Modelica的并联多通道系统流动不稳定性仿真研究
Simulation Research on Flow Instability of Parallel Multi-channel System Based on Modelica
童秋实 1邓康杰 2吕星 1曾小康 2王艳林 2杨浩 1陈路1
作者信息
- 1. 苏州同元软控信息技术有限公司,江苏 苏州 215123
- 2. 中国核动力研究设计院中核核反应堆热工水力技术重点实验室,四川 成都 610213
- 折叠
摘要
在核反应堆堆芯并联通道中,流动不稳定性会导致临界热流密度(CHF)明显下降或使堆芯燃料组件产生机械振荡,从而危及反应堆正常运行.为了解决该问题,在参考某高温高压汽水两相热工水力实验装置的基础上,基于NUMAP软件搭建了并联双通道系统模型进行流动不稳定性仿真研究.实验表明,当并联通道数分别为2、3、4时,通过仿真计算相同工况条件下并联多通道系统流动不稳定性边界,流动不稳定性边界计算误差不超过±5%,验证了存在多个并联加热通道时采用并联双通道结构即可获得其流动不稳定边界,证实了该软件对流动不稳定性现象的瞬态分析能力.
Abstract
In the parallel channel of the nuclear reactor core,flow instability can lead to a significant decrease in critical heat flux(CHF)or mechanical oscillation of the core fuel assembly,thereby endangering the normal operation of the reactor.In order to solve this problem,based on a high-temperature and high-pressure steam water two-phase thermal hydraulic experimental device,a parallel dual channel system model was built using NUMAP software for flow instability simulation research.The experiment shows that when the number of parallel channels is 2,3,and 4,the flow instability boundary of the parallel multi-channel system under the same operating conditions is calculated through simula-tion,and the calculation error of the flow instability boundary is not more than±5%.It is verified that the flow instability boundary can be ob-tained by using a parallel dual channel structure when there are multiple parallel heating channels,and the transient analysis ability of the soft-ware for flow instability phenomena is confirmed.
关键词
流动不稳定性/并联多通道系统/流动不稳定性边界/Modelica/NUMAPKey words
flow instability/parallel multi-channel system/flow instability boundary/Modelica/NUMAP引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据