| PTFE疏水修饰法消除多孔表面的沸腾迟滞现象 |
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| 引用本文： | 汪亚桥,罗佳利,符远翔,衡益,黄希哲,莫冬传,吕树申. PTFE疏水修饰法消除多孔表面的沸腾迟滞现象[J]. 工程热物理学报, 2020, 0(1): 175-179 |
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| 作者姓名： | 汪亚桥 罗佳利 符远翔 衡益 黄希哲 莫冬传 吕树申 |
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| 作者单位： | 中山大学材料学院;广东省先进热控材料与系统集成工程技术研究中心;中山大学数据科学与计算机学院 |
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| 基金项目： | 国家自然科学基金(No.51876226);广州市珠江科技新星项目(No.201710010043);高校基本科研业务费项目(No.GF培育专项) |
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| 摘 要： | 微纳多孔结构表面在提高沸腾传热性能的同时,通常也会伴随着沸腾迟滞现象出现.以底部树林状阵列结构、上部蜂窝状微纳双尺度多孔结构为基础的双层多孔表面在展示出良好性能的同时,也出现了沸腾迟滞现象。本文通过电泳沉积PTFE修饰的方法,降低多孔表面成核壁面过热度,从而基本消除双层多孔表面的沸腾迟滞效应。另外,修饰后的双层多孔表面的CHF和最大HTC与未修饰的双层多孔表面相比提高了20%和19%;和光滑铜表面相比,CHF提高了97%,HTC提高了400%,展现出优异的沸腾传热性能.
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| 关 键 词： | 疏水 沸腾迟滞 池沸腾 PTFE 多孔表面 |
PTFE Modification to Eliminate Boiling Hysteresis on Porous Surface |
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| Affiliation: | (School of Materials,Sun Yat-sen University,Guangzhou 510275,China;Guangdong Engineering Technology Research Centre for Advanced Thermal Control Material and System Integration(ATCMSI),Guangzhou 510275,China;School of Data and Computer Science,Sun Yat-sen University,Guangzhou 510275,China) |
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| Abstract: | A lot of researches demonstrate that the micro/nano porous surface can highly enhance boiling performance.However,a side phenomenon,the boiling hysteresis phenomenon often come with it.Just as in this paper,the two-layer porous surface consisting of copper forests on the bottom and honeycomb-like surface on the top show high boiling performance and boiling hysteresis.After modification with PTFE,the wall temperature for initial nucleation has been sharply decreased and eliminated the boiling hysteresis.What’s more,after modification the CHF and HTC of the porous surface has increased by 20% and 19% compared to the original one,and 97% and 400% compare d to the smooth copper surface. |
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| Keywords: | hydrophobic boiling hysteresis pooling boiling PTFE porous surface |
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