An experimental study of rain erosion effects on a hydro-/ice-phobic coating pertinent to Unmanned-Arial-System (UAS) inflight icing mitigation
An experimental study of rain erosion effects on a hydro-/ice-phobic coating pertinent to Unmanned-Arial-System (UAS) inflight icing mitigation
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DOI：
10.1016/j.coldregions.2020.103196
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发表时间：
2021
影响因子：
4.1
通讯作者：
Zichen Zhang;Liqun Ma;Yang Liu;Juan Ren;Hui Hu
中科院分区：
文献类型：
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作者：
Zichen Zhang;Liqun Ma;Yang Liu;Juan Ren;Hui Hu
进行了一项实验研究，以评估典型的疏水/冰表面在以相对较高的速度（即高达约 100 m/s）连续撞击水滴（即雨水侵蚀效应）之前和之后的表面润湿性和冰粘附强度的变化，这与无人机系统 (UAS) 飞行中结冰有关。该实验研究是利用爱荷华州立大学专门设计的雨水侵蚀测试装置进行的。将空气射流携带的微小水滴正常注入涂有典型超疏水表面（SHS）涂层的测试板上，以模拟云中微小水滴撞击无人机机身表面的场景。在实验过程中，表面润湿性（即水滴的静态接触角、前进接触角和后退接触角）和 SHS 涂层测试板上的冰粘附强度被量化为雨水侵蚀测试持续时间的函数。还使用原子力显微镜 (AFM) 系统测量了 SHS 涂层表面的表面拓扑随雨水侵蚀测试持续时间的变化。被侵蚀的 SHS 表面的表面润湿性和冰粘附强度的特征与 AFM 测量结果相关，以阐明底层物理原理，以便更好地了解在 UAS 飞行中结冰缓解的背景下雨水侵蚀对疏水/冰涂层的影响。
An experimental investigation was conducted to evaluate the variations of the surface wettability and ice adhesion strength on a typical hydro−/ice-phobic surface before and after undergoing continuous impingement of water droplets (i.e., rain erosion effects) at relatively high speeds (i.e., up to ~100 m/s) pertinent to Unmanned-Arial-System (UAS) inflight icing mitigation. The experimental study was conducted by leveraging a specially designed rain erosion testing rig available at Iowa State University. Micro-sized water droplets carried by an air jet flow were injected normally onto a test plate coated with a typical Super-Hydrophobic Surface (SHS) coating to simulate the scenario with micro-sized water droplets in the cloud impacting onto UAS airframe surfaces. During the experiments, the surface wettability (i.e., in the terms of static, advancing and receding contact angles of water droplets) and the ice adhesion strength on the SHS coated test plate were quantified as a function of the duration of the rain erosion testing. The surface topology changes of the SHS coated surface against the duration of the rain erosion testing were also measured by using an Atomic Force Microscope (AFM) system. The characteristics of the surface wettability and ice adhesion strength on the eroded SHS surface are correlated with the AFM measurement results to elucidate the underlying physics for a better understanding about the rain erosion effects on hydro−/ice-phobic coatings in the context of UAS inflight icing mitigation.