Contact angle measurements of pure refrigerants
Contact angle measurements of pure refrigerants
复制标题
纯制冷剂的接触角测量
DOI：
10.1016/j.ijheatmasstransfer.2016.06.099
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发表时间：
2016-11-01
影响因子：
5.2
通讯作者：
Xu, Xiongwen
中科院分区：
文献类型：
--
作者：
Lu, Xingbin;Liu, Jinping;Xu, Xiongwen
接触角是描述润湿性的最重要的可测量特征，在两相换热中起着至关重要的作用。在0-45℃温度范围内，测量了制冷剂(R134a、R22、R290、R600a、R32)与金属铜/不锈钢/铝的接触角。通过安装在实验压力容器上的观察孔观察了制冷剂的半月面液气界面。用拉普拉斯微分方程组对其曲线进行拟合。拉普拉斯曲线分析表明，接触角的测量误差随着接触角的减小而增大。通过对拉普拉斯曲线拟合和自动多项式曲线拟合的比较，揭示了自动多项式曲线拟合在预测区域中的缺陷。接触角测量表明，制冷剂相对于普通材料表面具有超强的润湿性。(C)2016爱思唯尔有限公司。保留所有权利。
The contact angle is the most important measurable characteristic to describe wettability, which plays a critical role in two-phase heat transfer. In this work, the contact angle of refrigerants (R134a, R22, R290, R600a, R32) with the metal copper/stainless steel/aluminum has been measured in the temperature range of 0-45 degrees C. The meniscus liquid-vapor interface of refrigerant was observed through the view port installed on the experimental pressure vessel. Its curve was fitted by Laplacian differential equations. The analysis of Laplacian curve shows that the error of contact angle measurement will increase with the decrease of the contact angle. Comparing the curve fittings of Laplacian and automatic polynomial, the defect of the automatic polynomial curve fitting in prediction area is exposed. The contact angle measurements show the super wettability of the refrigerants in regards to common material surfaces. (C) 2016 Elsevier Ltd. All rights reserved.