高压工况下管内垂直向上流动沸腾CHF机理模型研究

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Study on CHF Mechanistic Model in Upflow Boiling Vertical Round Tube under High Pressure

1. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China;
2. School of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China

摘要: 针对高压工况下偏离泡核沸腾(DNB)型临界热流密度(CHF)的特点,重新构建了Weisman & Pei模型的本构关系式;针对高压工况下干涸(Dry-out)型CHF,比较分析了Kataoka、Celata以及Hewitt 3个沉积率和夹带率计算关系式的结果。基于以上两类改进的CHF模型,建立了一个适用于高压工况的、结合DNB型和Dry-out型沸腾临界机理的CHF模型。采用高压工况下管内垂直向上流动沸腾CHF实验数据对建立的CHF机理模型进行了验证,分析了热工参数和几何参数的趋势效应。
- 高压工况 /
- 圆管 /
- 流动沸腾 /
- CHF机理模型
Abstract: According to the characteristics of DNB type CHF under high pressure, the constitutive correlations of Weisman & Pei model are proposed. The prediction results of three entrainment and deposition correlations of Kataoka, Celata and Hewitt corresponding to the Dry-out type CHF are analyzed. Based on the two improved models above, a comprehensive CHF mechanistic model under high pressure condition combined the DNB and Dry-out type boiling crisis is established. The verification based on the experiment database of upflow boiling in vertical round tube and the parametric trends analysis of CHF with thermal-hydraulic and geometric parameters are carried out.
- High pressure /
- Round tube /
- Upflow boiling /
- CHF mechanistic model