Preparation and anti-icing of superhydrophobic PVDF coating on a wind turbine blade

Peng, Chaoyi; Xing, Shengtao; Yuan, Zhiqing; Xiao, Jiayu; Chun-qi, Wang; Zeng, Jing

doi:10.1016/j.apsusc.2012.07.118

Cited by 123 publications

(65 citation statements)

References 54 publications

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“…A major reason for such a remarkable interest in superhydrophobic coatings and surfaces has been their interesting combination of properties, such as the self-cleaning, anti-fouling, stain-resistant and ice-repellant behaviors [3][4][5], which enable potential applications in a variety of fields, which include paints and coatings, textiles, exterior glass windows, rooftops, windshields, solar panels, aircraft wings and wind turbine blades [3,4,6,7]. As well documented in the literature, wetting behavior of a surface is mainly controlled by two parameters, which are; (i) the surface chemical structure and composition, and (ii) the surface topography or roughness [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Influence of the coating method on the formation of superhydrophobic silicone–urea surfaces modified with fumed silica nanoparticles

Söz

Yılgör

Jonáš

2015

Progress in Organic Coatings

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Section: Introductionmentioning

confidence: 99%

Influence of the coating method on the formation of superhydrophobic silicone–urea surfaces modified with fumed silica nanoparticles

Söz

Yılgör

Jonáš

2015

Progress in Organic Coatings

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“…These studies have revealed the underlying mechanics and possible outcomes of droplet splashing and are industrially relevant to processes such as spray coating, spray cooling and inkjet printing. However, very few studies have been performed at oblique impact angles or at high impact velocities (over 10 m/s), relevant to engineering problems such as rain erosion on fast moving vehicles and turbine blades [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Splashing Threshold of Oblique Droplet Impacts on Surfaces of Various Wettability

Aboud

Kietzig

2015

Langmuir

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Oblique drop impacts were performed at high speeds (up to 27 m/s, We>9000) with millimetric water droplets, and a linear model was applied to define the oblique splashing threshold. Six different sample surfaces were tested: two substrate materials of different inherent surface wettability (PTFE and aluminum), each prepared with three different surface finishes (smooth, rough, and textured to support superhydrophobicity). Our choice of surfaces has allowed us to make several novel comparisons. Considering the inherent surface wettability, we discovered that PTFE, as the more hydrophobic surface, exhibits lower splashing thresholds than the hydrophilic surface of aluminum of comparable roughness. Furthermore, comparing oblique impacts on smooth and textured surfaces, we found that asymmetrical spreading and splashing behaviours occurred under a wide range of experimental conditions on our smooth surfaces, however impacts 2 occurring on textured surfaces were much more symmetrical, and one-sided splashing occurred only under very specific conditions. We attribute this difference to the air-trapping nature of textured superhydrophobic surfaces, which lowers the drag between the spreading lamella and the surface. The reduced drag affects oblique drop impacts by diminishing the effect of the tangential component of the impact velocity, causing the impact behaviour to be governed almost exclusively by the normal velocity. Finally, by comparing oblique impacts on superhydrophobic surfaces at different impact angles, we discovered that although the pinning transition between rebounding and partial rebounding is governed primarily by the normal impact velocity, there is also a weak dependence on the tangential velocity. As a result, pinning is inhibited in oblique impacts. This led to the observation of a new behaviour in highly oblique impacts on our superhydrophobic surfaces which we named the stretched rebound, where the droplet is extended into an elongated pancake shape and rebounds while still outstretched, without exhibiting a recession phase.

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“…Peng et al have developed and applied a superhydrophobic polyvinylidene fluoride (PVDF) coating on wind blades for anti-icing tests. Results showed lack of ice formation on the blade surface for 50 min at freezing temperatures [19]. Nevertheless, these tests may have not been completed in accordance with the actual operational performance characteristics of wind turbines in regard to the consideration of environmental factors and the AOA.…”

Section: Introductionmentioning

confidence: 99%

Anti-Icing Performance of Hydrophobic Silicone–Acrylate Resin Coatings on Wind Blades

Jiang

et al. 2018

Coatings

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Abstract:The icing of wind blades poses a serious threat to the operation of wind turbines. The application of superhydrophobic coatings on wind blades can serve as a potential anti-icing method. This study presents the findings of simulations of the icing environment of wind blades coated with hydrophobic silicone-acrylate resin in an artificial climate chamber. Artificial icing tests were performed on NACA7715 wind blades with four different silicone-acrylate resin coatings and on uncoated wind blades, with test performed at five different wind speeds and three different angles of attack. Results show that wind blade surfaces with higher hydrophobicity yield better anti-icing performance, and that the ice mass of the wind blades decreases with increasing wind speeds and angles of attack. In addition, variations in ice mass, shape, and distribution on different wind blades indicate that increased hydrophobicity can help limit the areas that are subject to freezing. Hydrophobicity can affect the air cavities of the ice deposited on the wind blades, and surfaces with increased hydrophobicity can lead to lower ice mass and less ice adhesion. In brief, surfaces with higher hydrophobicity demonstrate better anti-icing performance and benefit from active de-icing.

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Preparation and anti-icing of superhydrophobic PVDF coating on a wind turbine blade

Cited by 123 publications

References 54 publications

Influence of the coating method on the formation of superhydrophobic silicone–urea surfaces modified with fumed silica nanoparticles

Influence of the coating method on the formation of superhydrophobic silicone–urea surfaces modified with fumed silica nanoparticles

Splashing Threshold of Oblique Droplet Impacts on Surfaces of Various Wettability

Anti-Icing Performance of Hydrophobic Silicone–Acrylate Resin Coatings on Wind Blades

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