| Under the background of"double carbon target",renewable energy has ushered in new development opportunities.With the advantages of clean,pollution-free and sufficient reserves,wind power plays a key role in realizing energy conservation and emission reduction,improving rural ecological environment and promoting agricultural economic development.In recent years,global climate conditions are deteriorating constantly,and extreme climate occurs frequently.Wind turbines are often affected by severe weather such as cold wave,frost and blizzard,which leads to icing phenomenon on the surface of wind turbine blades.Icing on the blade surface will damage its aerodynamic performance and reduce the power generation efficiency of the wind turbine.In addition,ice on the surface of the blades can increase their weight and reduce the safety and stability of the wind turbine operation.Superhydrophobic coating as a passive anti-icing method has become a research hotspot.In recent years,researchers have combined photothermal materials with superhydrophobic materials to give coatings the properties of two materials,which convert sunlight into thermal energy.However,the current research on the application of photothermal hydrophobic coating on the surface of wind turbine blades is relatively lacking.Therefore,it is of great theoretical significance and engineering practical value to explore the anti-icing effect of photothermal superhydrophobic coating on the surface of wind turbine blades.（1）In this study,ZnO nanoparticles were loaded on the surface of Mo S2nanosheets by a combination of hydrothermal method and liquid-phase method,and Mo S2/ZnO photothermal nano-superhydrophobic materials were prepared.The synthetic materials were characterized and analyzed by X-ray photoelectron spectroscopy（XPS）and scanning electron microscopy（SEM）from the aspects of chemical composition and microstructure.It was found that Mo S2/ZnO clusters are ultra-thin sheet morphology,and the surface of Mo S2/ZnO is hilly nano-rough structure,which has a typical superhydrophobic nanostructure.（2）The contact Angle（CA）and rolling Angle（SA）of the photothermal nano superhydrophobic coating of Mo S2/ZnO are 152.5°and 4.7°respectively by the contact Angle measuring instrument,showing superhydrophobicity.The adhesion strength between the surface of the coating and the ice is 78 k Pa,which is 60.2%less than that without the coating,showing low adhesion.The surface mechanical strength and chemical stability of Mo S2/ZnO nanomaterial coating were tested,and the coating showed stable mechanical strength and durability.Finally,the anti-icing performance of Mo S2/ZnO nano-superhydrophobic coating blades was tested by icing wind tunnel test.The anti-icing performance of NACA0018 airfoil blade model with or without Mo S2/ZnO coating at different ambient temperatures and wind speeds was compared.The results show that the amount of icing on the surface of blade airfoil with Mo S2/ZnO coating is less than that without coating.At-8℃and 9 m/s,the icing thickness and icing area of the leading edge of the blade airfoil decrease by 21.7%and 14.5%,respectively.（3）The photothermal properties of Mo S2/ZnO photothermal nano superhydrophobic materials were tested.The absorbance reached 0.99 in the wavelength range of 200～850 nm,showing excellent photothermal properties.The photothermal ice coating of superhydrophobic nano-materials was carried out by using ice wind tunnel to simulate natural environment.The anti-icing performance of NACA0018 airfoil blade model with or without Mo S2/ZnO coating under different ambient temperature,wind speed,light intensity and Angle of attack was studied.The results show that Mo S2/ZnO photothermal nano-superhydrophobic materials have good anti-ice performance at high temperature and low wind speed. |
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