| WAN Yan-ling,YAN Can-dong,WANG Bo,YU Hua-dong.The Influence of Microstructure Geometric Parameters on the Icing Properties of Aluminum Alloy Surface[J],51(1):272-279 |
| The Influence of Microstructure Geometric Parameters on the Icing Properties of Aluminum Alloy Surface |
| Received:April 09, 2021 Revised:May 31, 2021 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.01.029 |
| KeyWord:wire electrical discharge machining (WEDM) geometric parameters microstructure superhydrophobicity anti-icing performance stability |
| Author | Institution |
| WAN Yan-ling |
Key Laboratory of the Ministry of Education on Cross-Scale Micro and Nano-Manufacturing, Changchun University of Science and Technology, Changchun , China |
| YAN Can-dong |
Key Laboratory of the Ministry of Education on Cross-Scale Micro and Nano-Manufacturing, Changchun University of Science and Technology, Changchun , China |
| WANG Bo |
Key Laboratory of the Ministry of Education on Cross-Scale Micro and Nano-Manufacturing, Changchun University of Science and Technology, Changchun , China |
| YU Hua-dong |
Key Laboratory of the Ministry of Education on Cross-Scale Micro and Nano-Manufacturing, Changchun University of Science and Technology, Changchun , China |
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| Abstract: |
| This paper is to prepare a stable anti-icing surface, and to explore the influence of surface microstructure geometric parameters on the surface icing performance. In this paper, aluminum alloy is used as the base material, and the wire electrical discharge machining (WEDM) is used to construct an array structure of controllable micron-sized grooves and square pillars on the surface of the material. The wettability, icing performance and stability of the sample were tested. The results show that the surface of the prepared microstructure is superhydrophobic or nearly superhydrophobic. The microstructure surface has excellent anti-icing performance, and the anti-icing performance of the square pillar structure surface is better than that of the groove structure surface. The increase in the height of the microstructure and the decrease in the width will delay the freezing time of the water droplets on the surface of the microstructure, and the width has a greater influence. The freeze-melt cycle test shows that the surface of the microstructure has a certain degree of stability. The analysis of the anti-icing mechanism shows that the two-level structure of the microstructure surface forms the “air cushion effect”, which improves the hydrophobicity of the surface and reduces the solid-liquid contact area; the height of the microstructure increases, the width decreases, and the shape changes from grooves to square pillars, which increases the heat transfer resistance, reduces the heat transfer area, and slows down the thermal energy loss of the droplets during three-phase contact, thus prolonging the freezing time. The WEDM method improves the hydrophobicity of the surface while constructing the microstructure, and the geometric parameters of the microstructure improve the anti-icing performance of the surface to varying degrees, providing a new idea for exploring new anti-icing surfaces. |
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