矩形窄通道内泡状流向搅拌流转变预测模型

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基金项目:

中核核反应堆热工水力技术重点实验室基金(9140C7101010701)

Modeling on Bubbly to Churn Flow Pattern Transition in Narrow Rectangular Channel

CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear power institute of China, Chengdu, 610041, China

摘要: 在池式沸腾Helmholtz失稳模型的基础上,通过进一步的假设,构建流动沸腾条件下矩形窄通道内泡状流向搅拌流流型转变机理模型。基于调研的已有研究成果,得到矩形窄通道内汽泡可能稳定存在的极限尺寸,并由此得到泡状流向搅拌流转变的热边界条件。利用已有实验数据对该机理模型进行评价,该模型在低压条件下与实验数据符合得较好。
- 窄隙矩形通道 /
- 泡状流 /
- 搅拌流 /
- 流型转变 /
- 模型
Abstract: A theoretical model based on some reasonable concepts was developed to predict the bubbly flow to churn flow pattern transition in vertical narrow rectangular channel under flow boiling condition.The maximum size of ideal bubble in narrow rectangular channel was calculated based on previous literature.The thermal hydraulics boundary condition of bubbly to churn flow pattern transition was exported from Helmholtz and maximum size of ideal bubble.The theoretical model was validated by existent experimental data.
- Narrow rectangular channels /
- Bubbly flow /
- Churn flow /
- Flow pattern transition /
- Model