Bubble Growth in Saturated Pool Boiling of Water on a Smooth Surface
Bubble Growth in Saturated Pool Boiling of Water on a Smooth Surface
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光滑表面上饱和水池沸腾的气泡生长
DOI：
10.11159/icmfht22.143
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Mahmoud M
中科院分区：
文献类型：
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作者：
Mahmoud M
池沸腾的研究已有多年，目前已有几种预测核态池沸腾换热的模型。然而，这些模型之间存在着很大的差异。现有的模型大多依赖于成核点密度和气泡生长速率、偏离直径和频率等气泡动力学参数。因此，用于预测气泡动力学参数的模型会影响换热模型的性能。本文对常压下去离子水在光滑铜表面饱和沸腾过程中气泡生长速率进行了实验研究。这些测量只针对孤立的气泡区域进行。为了避免表面微观结构对气泡动力学的不确定影响，选择了光滑的表面。将得到的实验数据与现有的气泡生长模型进行了比较。结果表明，随着壁面过热度的增加，气泡的生长速率和脱离直径增大。本文有助于阐明气泡动力学，从而有助于理解现有的机械换热模型的性能和结果。
Pool boiling has been investigated for many years and there are several models for the prediction of the nucleate pool boiling heat transfer. However, there are large discrepancies among these models. Most of the existing models depend on the nucleation site density and the bubble dynamics parameters, such as bubble growth rate, departure diameter and frequency. Thus, the performance of the heat transfer models can be affected by the models used for the prediction of the bubble dynamics parameters. In this paper, an experimental study was conducted to measure the bubble growth rate in saturated pool boiling of de-ionised water on a smooth copper surface at atmospheric pressure. The measurements were conducted only for the isolated bubble regime. A smooth surface was selected to avoid the uncertain effects of surface microstructure on bubble dynamics. The obtained experimental data were compared with some existing bubble growth models. The results demonstrated that bubble growth rate and departure diameter increase as wall superheat increases. The paper helps elucidate bubble dynamics and thus can contribute in understanding the performance and results given by existing mechanistic heat transfer models.