倾角变化的窄缝通道内CHF理论模型

张亚培; 田文喜; 秋穗正; 苏光辉; 余红星; 闫晓

倾角变化的窄缝通道内CHF理论模型

1. 西安交通大学动力工程多相流国家重点实验室, 西安, 710049;
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, 成都, 610041;
3. 中国核动力研究设计院核反应堆系统工程设计技术重点实验室, 成都, 610041

基金项目:

大型先进压水堆重大专项课题(2011ZX06004-008)

中核核反应堆热工水力技术重点实验室基金资助项目(9140C710603)

详细信息

作者简介:
张亚培(1984-),男,博士研究生。现主要从事核反应堆热工水力分析的研究工作。

田文喜(1979-),男,副教授,硕士生导师。2006年毕业于西安交通大学核能科学与工程专业,获博士学位。现主要从事核反应堆热工水力分析及汽液两相流动与沸腾传热的研究。

秋穗正(1965-),男,教授,博士生导师。1996年毕业于西安交通大学核能科学与工程专业,获博士学位。现主要从事核反应堆热工水力、核动力装置系统稳态和瞬态热工水力安全特性研究。

中图分类号: TL33
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出版历程
- 收稿日期: 2012-02-10
- 修回日期: 2012-03-09
- 网络出版日期: 2025-03-08

Analytical Model for CHF in Narrow Gaps Concerning Surface Orientation

1. State Key Laboratory on Power Engineering and Multi-Phase Flow, Xi'an Jiaotong University, Xi'an, 710049, China;
2. CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institution of China, Chengdu, 610041, China;
3. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610041, China

摘要

摘要: 对倾角变化的矩形窄缝通道的临界热流密度（CHF）进行分析,基于逆向对流限制（CCFL）机理建立相应的理论分析模型,并将该理论模型的预测结果与已有的实验结果进行对比。结果表明:当矩形窄缝通道尺寸为1 mm和2 mm,且倾角在范围在15°⁹0°时,预测结果与实验值符合得比较好;在倾角小于15°时,理论模型对CHF的预测明显小于实验值;修正的Katto-Kosho关系式可以比较准确地预测倾角小于15°时的CHF值;当通道尺寸为5 mm和10 mm时,预测值比实验值大,这表明基于CCFL机理的CHF预测理论模型仅适用于通道尺寸小于等于2 mm的窄缝通道。
- 临界热流密度 /
- 矩形窄缝 /
- 逆向对流限制
Abstract: The CHF in rectangular narrow gaps have been investigated to develop a reasonable predictive model on CHF concerning surface orientation effects.The model is based on the counter current flow limita-tion（CCFL） by flooding of the flow entering gap.The results by the predictive model were compared with the experimental data by Kim and Suh（2003）,and a good agreement was obtained in case of 1 mm and 2 mm gap size with surface inclination angle ranging from 10°-90°.However,when the surface inclination angle is less than 10°（nearly downward-facing position）,the predictive model underestimated the CHF.The reason may be that the heating surface is covered by a stable vapor film and the vapor film is almost stationary,and that the effects of CCFL on CHF became smaller.A modified Katto-Kosho correlation was further proposed and it could predict the CHF well for inclination angle less than 10°.For gap size equaling to 5 mm and 10 mm,the predictive results were far larger than experimental data by Kim and Suh,which indicated that the validity of model based on CCFL controlled CHF was limited to gaps of less than 2 mm.
- CHF /
- Rectangular narrow gap /
- CCFL