A theory on the icing evolution of supercooled water near solid substrate
A theory on the icing evolution of supercooled water near solid substrate
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DOI：
10.1016/j.ijheatmasstransfer.2015.08.005
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发表时间：
2015-12-01
影响因子：
5.2
通讯作者：
Liu, Hong
中科院分区：
文献类型：
--
作者：
Kong, Weiliang;Liu, Hong
冰-水界面的形状对冰的形成和生长规律有重要影响。然而，由于对过冷水中结冰形式的认识还不够深入，本文研究了过冷水中平面固体衬底上结冰的非定常生长。设计了一种在固体衬底上触发结冰并从两个方向同时观察整个结冰过程的实验。观测到了结冰过程的三个阶段，并根据实验结果对结冰过程中结冰和阶段转换的机理进行了理论解释。该理论包括三个阶段的结冰速度方程和非稳态温度场下冰水界面稳定性判据，该判据决定了结冰形式和结冰速率。该模型的计算结果能较好地预测结冰形态的变化，与实验结果吻合较好。因此，结冰形式的变化对固体基质(如飞机或户外设备)上的结冰过程有显著影响。(C)2015爱思唯尔有限公司。保留所有权利。
The shape of ice-water interface has significant impact on the form and law of ice growth. However, knowledge about the form of icing in the supercooled water is insufficient.This paper investigates the unsteady ice growth on a planar solid substrate in supercooled water. An experiment is designed to trigger icing on a solid substrate and observe the whole icing process from two directions simultaneously. An evolution of ice growth that consists of three stages is observed.Based on the experimental results, a theory is presented to explain the mechanisms of ice growth and stage conversion of in the icing process. This theory includes the equations of ice growth velocity in three stages and the criterion of ice-water interface stability in an unsteady temperature field, which determines the icing form and rate.A multi-stage icing model is presented for icing prediction. The calculated results using this model could predict the conversion of icing forms and fits well with experimental results. Therefore, the change in the form of icing significantly impacts the ice accretion process on a solid substrate, such as aircraft or outdoor devices. (C) 2015 Elsevier Ltd. All rights reserved.