Experimental study for effect of mean volumetric diameter on ice adhesion strength
-
摘要: 冰附着力是冰与基底表面之间的作用力，研究环境参数对冰附着力的影响对认识冰附着力机理、开发防除冰方法以及分析融冰和脱冰特性具有重要的意义。在基底不变的条件下，实验研究了静态结冰以及相同水含量、不同平均粒径（40、80、250μm）的水雾在不同温度（-25~0℃）下的动态结冰的冰附着力（剪切力）的变化情况。相对于静态结冰，动态结冰的冰附着力随温度的变化存在一个转折点，可称该转折点所对应的温度为临界温度。在临界温度以上，冰附着力随温度的降低而增加，成冰方式对冰附着力影响不大；而在临界温度以下，动态结冰所成冰的冰附着力相对于静态结冰明显要小，所成冰从明冰向混合冰或者霜冰转变。水雾平均粒径不同，临界温度随之变化，动态结冰的冰附着力随温度的变化趋势也随之变化。Abstract: Ice adhesion strength is the interaction between the ice and the solid substrate. Research about how experimental parameters influence ice adhesion strength is important to the understanding of the mechanism of ice adhesion strength, the developing of anti-ice method and the analysis of the Ice shedding. In the experiments, the same substrate and the liquid water content are used, and the ice adhesion strength is measured at different temperatures (-25~0℃) and different mean volumetric diameters (40, 80 and 250μm). Different from freezer ice, there exists a turning point for impact ice as the pattern of the ice adhesion strength changes due to the variation of temperature, which can be called the critical temperature. As the temperature decreasing from 0℃, above the critical temperature the ice adhesion strength does not depend on whether it is freezer ice or impact ice. But below the critical temperature, the ice adhesion strength of impact ice is lower, with the ice regime transforming from glaze ice to rime ice. The critical temperature changes as the mean volumetric diameter changes, so as the variation trend of the ice adhesion strength.
-
Key words:
- ice adhesion strength /
- impact ice /
- freezer ice /
- mean volumetric diameter /
- glaze ice /
- rime ice /
- mix ice
-
图 2 Winner319工业喷雾激光粒度分析仪
Figure 2. The Winner319 industrial spray laser particle size analyzer
图 3 离心测力装置
Figure 3. Schematic of top view of the centrifuge apparatus for IAS(Ice Adhesion Strength). All values are in mm
图 4 Al6061基底在T=-5、-10、-15、-20和-25℃时的冰附着力
Figure 4. Ice adhesion of a Al6061 substrate at T=-5, -10, -15, -20, -25℃
-
[1] Yeong Y H, Athanasios M, Eric L. Atmospheric ice adhesion on water-repellent coatings:wetting and surface topology effects[J]. Langmuir, 2015, 31(48):13107-13116. doi: 10.1021/acs.langmuir.5b02725 [2] Stefania T, Carlo A, Alidad A, et al. Investigation of ice shedding properties of superhydrophobic coatings on helicopter blades[J].. Cold Regions Science and Technology, 2014, 100:50-58. doi: 10.1016/j.coldregions.2013.12.009 [3] Jared S, Jose P, Timothy E, et al. Ice adhesion mechanisms of erosion-resistant coatings[J]. AIAA Journal, 2015, 53(3):654-662. doi: 10.2514/1.J053208 [4] Young T. An essay on the cohesion of fluids[J]. Phil Trans R Soc London, 1805, 95:65-87. doi: 10.1098/rstl.1805.0005 [5] Wenzel R N. Resistance of solid surfaces to wetting by water[J]. Ind Eng Chem, 1936, 28(8):988-994. doi: 10.1021/ie50320a024 [6] Cassie A B D, Baxter S. Wettability of porous surfaces[J]. Trans Faraday Soc, 1944, 40:546-551. doi: 10.1039/tf9444000546 [7] Saito H, Takai K, Yamauchi G. Water-and ice-repellent coatings[J]. Surf Coat Int, 1997, 80(4):168-171. doi: 10.1007/BF02692637 [8] Stallabrass J R, Price R D. On the adhesion of ice to various materials[J]. National Research Laboratory, Report LR-350, 1962. https://repository.tudelft.nl/view/aereports/uuid:bb12ef2e-c3b2-4d43-aaac-66bcdadde122/ [9] Itagaki K. Mechanical ice release processes I. Self-shedding from high speed rotors[R]. CCREL Report 83-26, 1983. http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA135369 [10] Frederic G, Caroline L, Marie-Isabelle F, et al. Analytical model based on experimental data of centrifuge ice adhesion tests with different substrates[J]. Cold Regions Science and Technology, 2016, 121:93-99. doi: 10.1016/j.coldregions.2015.10.011 [11] Zaid A J. The influence of freezing and ambient temperature on the adhesion strength of ice[J]. Cold Regions Science and Technology, 2017, 140:14-19. doi: 10.1016/j.coldregions.2017.05.001 [12] Momen G, Jafari R, Farzaneh M. Ice repellency behaviour of superhydrophobic surfaces:effects of atmospheric icing conditions and surface roughness[J]. Appl Surf Sci, 2015, 349:211-218. doi: 10.1016/j.apsusc.2015.04.180 [13] Zhang C, Liu H. Effect of drop size on the impact thermodynamics for supercooled large droplet in aircraft freezing[J]. Physics of Fluids, 2016:062107. https://www.osti.gov/scitech/biblio/22598959 [14] Laforte C, Laforte J L. How a solid coating can reduce ice adhesion on structures[C]//Proceedings of the 10th International Workshop of Atmospheric Icing of Structures, Brno, Czech Republic, 2002. doi: 10.1007/s10891-016-1516-3 -
下载:
点击查看大图
图(6)
计量
- 文章访问数: 160
- HTML全文浏览量: 72
- PDF下载量: 7
- 被引次数: 0
