Critical heat flux as a mass flux dependent local or global phenomenon: Theoretical analysis and experimental confirmation

Ding Wei; Geissler Thomas; Krepper Eckhard; Hampel Uwe

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Critical heat flux as a mass flux dependent local or global phenomenon: Theoretical analysis and experimental confirmation

机译：临界热通量作为质量磁通依赖的局部或全球现象：理论分析和实验证实

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In this article, we report on a theoretical analysis and experimental investigations on critical heat flux (CHF) in subcooled flow boiling. Commonly, CHF is considered as a local phenomenon. A validated CHF- concept recently developed in our group indicated that CHF may be initiated in two different ways, that is, locally and globally. We designed and conducted an experiment to verify this hypothesis. The experimental results agree well with the expectations from our CHF- modelling and confirm the two mechanisms. Following that, we continued to clarify the role of different parameters, such as channel orientation, channel length and hydraulic diameter. The new concept of CHF is useful to explain and predict CHF at conditions of low pressure and low fluid velocity.

机译：本文在本文中，我们报告了临界流动沸腾中临界热通量（CHF）的理论分析和实验研究。通常，CHF被认为是当地现象。我们集团最近开发的经过验证的CHF概念表明，CHF可以以两种不同的方式启动，即在本地和全球范围内。我们设计并进行了实验以验证这一假设。实验结果与我们的CHF建模的期望吻合并确认了两种机制。在此之后，我们继续阐明不同参数的作用，例如沟道方向，通道长度和液压直径。 CHF的新概念可用于在低压和低流体速度条件下解释和预测CHF。

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来源
《International Journal of Thermal Sciences》 |2018年第2018期|共8页
作者
Ding Wei; Geissler Thomas; Krepper Eckhard; Hampel Uwe;
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作者单位

Helmholtz Zentown Dresden Rossendorf Inst Fluid Dynam Dresden Germany;

Helmholtz Zentown Dresden Rossendorf Inst Fluid Dynam Dresden Germany;

Helmholtz Zentown Dresden Rossendorf Inst Fluid Dynam Dresden Germany;

Helmholtz Zentown Dresden Rossendorf Inst Fluid Dynam Dresden Germany;

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原文格式 PDF
正文语种 eng
中图分类热力工程、热机;
关键词
Boiling; Critical heat flux; Initiation mechanisms;

机译：沸腾;临界热通量;启动机制;

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机译：临界热通量作为质量磁通依赖的局部或全球现象：理论分析和实验证实
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Critical heat flux as a mass flux dependent local or global phenomenon: Theoretical analysis and experimental confirmation

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