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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Experimental investigation on bubble dynamics and boiling heat transfer for saturated pool boiling and comparison data with previous works
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Experimental investigation on bubble dynamics and boiling heat transfer for saturated pool boiling and comparison data with previous works

机译：饱和池沸腾泡沫动力学和沸腾热传递的实验研究与先前作品的比较数据

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摘要

This paper experimentally investigates the boiling heat transfer capability and the bubble dynamic characteristics for the saturated pool boiling through thermocouple measurement and high-speed camera observation. The bubble dynamics include the bubble departure diameter, the bubble departure frequency, and the nucleation site density. The boiling curve for the pool boiling is also obtained. Applicability of the boiling heat transfer models in the thermal industries strongly relies on the appropriate correlations for these bubble dynamic parameters. In this paper, the correlations for the bubble departure diameter/departure frequency, the nucleation site density, and the boiling curve have been assessed with the present measurements. The data from the previous works are also compared to demonstrate reasonability of the present results. Using the least-square-method, the relationship of bubble dynamics with the wall superheat can be regressed. Comparison of the boiling curves between the measurements and predictions are also presented. The predicted boiling curve is obtained from the wall heat flux partitioning model with the input of the regressed equations for the bubble dynamics. The agreement reveals that the present boiling curve and bubble dynamics can provide the useful information for validation of CFD two-phase and boiling heat transfer models, which is one of main contributions from the present work.
机译：本文通过热电偶测量和高速摄像机观察，实验研究了饱和池沸腾的沸腾传热能力和气泡动态特性。气泡动力学包括气泡偏离直径，气泡脱落频率和成核位点密度。还获得了泳池沸腾的沸腾曲线。热产业中沸腾传热模型的适用性强烈依赖于这些泡沫动态参数的适当相关性。本文评估了本发明的测量，对气泡脱离直径/脱离频率，成核位点密度和沸腾曲线的相关性。还比较来自以前的作品的数据，以证明目前结果的合理性。使用最小二乘法，可以回归与壁过热的气泡动力学的关系。还提出了测量和预测之间的沸腾曲线的比较。预测的沸腾曲线是从壁热通量分区模型获得的，利用用于泡沫动力学的回归方程的输入。该协议显示，目前沸腾曲线和气泡动力学可以提供用于验证CFD两相和沸腾传热模型的有用信息，这是本作工作的主要贡献之一。

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