Helmholtz-Zentrum Dresden-Rossendorf (HZDR) Critical heat flux as a mass flux dependent local or global phenomenon: Theoretical analysis and experimental confirmation
Helmholtz-Zentrum Dresden-Rossendorf (HZDR) Critical heat flux as a mass flux dependent local or global phenomenon: Theoretical analysis and experimental confirmation
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发表时间：
2020
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通讯作者：
W. Ding;T. Geissler;E. Krepper;U. Hampel
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作者：
W. Ding;T. Geissler;E. Krepper;U. Hampel
7在本文中，我们报告了8次过冷流动沸腾中临界热流密度（CHF）的理论分析和实验研究。通常，CHF被认为是一种局部现象。我们小组最近开发的一个经验证的CHF概念9表明，CHF可能以两种不同的方式启动，即本地和全球。我们设计并进行了一个实验来验证这一假设。实验结果与我们的CHF模型的预期一致，并证实了这两种机制。在此之后，我们12继续阐明不同参数的作用，例如通道方向、通道长度和水力直径。CHF的新概念有助于解释和预测低压低流速条件下的CHF。15
7 In this article, we report on a theoretical analysis and experimental investigations on critical heat flux (CHF) in 8 subcooled flow boiling. Commonly, CHF is considered as a local phenomenon. A validated CHFconcept 9 recently developed in our group indicated that CHF may be initiated in two different ways, that is, locally and 10 globally. We designed and conducted an experiment to verify this hypothesis. The experimental results agree 11 well with the expectations from our CHFmodelling and confirm the two mechanisms. Following that, we 12 continued to clarify the role of different parameters, such as channel orientation, channel length and hydraulic 13 diameter. The new concept of CHF is useful to explain and predict CHF at conditions of low pressure and low 14 fluid velocity. 15