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首页> 外文期刊>Coatings >Top Coating Anti-Erosion Performance Analysis in Wind Turbine Blades Depending on Relative Acoustic Impedance. Part 2: Material Characterization and Rain Erosion Testing Evaluation
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Top Coating Anti-Erosion Performance Analysis in Wind Turbine Blades Depending on Relative Acoustic Impedance. Part 2: Material Characterization and Rain Erosion Testing Evaluation

机译：基于相对声阻抗的风力涡轮机叶片涂层抗腐蚀性能分析。第2部分：材料表征和雨侵蚀测试评估

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Under droplet impingement, surface leading edge protection (LEP) coating materials for wind turbine blades develop high-rate transient pressure build-up and a subsequent relaxation in a range of strain rates. The stress-strain coating LEP behavior at a working frequency range depends on the specific LEP and on the material and operational conditions, as described in this research in a previous work. Wear fatigue failure analysis, based on the Springer model, requires coating and substrate speed of sound measurements as constant input material parameters. It considers a linear elastic response of the polymer subjected to drop impact loads, but does not account for the frequency dependent viscoelastic effects for the materials involved. The model has been widely used and validated in the literature for different liquid impact erosion problems. In this work, it is shown the appropriate definition of the viscoelastic materials properties with ultrasonic techniques. It is broadly used for developing precise measurements of the speed of sound in thin coatings and laminates. It also allows accurately evaluating elastic moduli and assessing mechanical properties at the high frequencies of interest. In the current work, an investigation into various LEP coating application cases have been undertaken and related with the rain erosion durability factors due to suitable material impedance definition. The proposed numerical procedures to predict wear surface erosion have been evaluated in comparison with the rain erosion testing, in order to identify suitable coating and composite substrate combinations. LEP erosion performance at rain erosion testing (RET) technique is used widely in the wind industry as the key metric, in an effort to assess the response of the varying material and operational parameters involved.
机译：在液滴冲击下，用于风力涡轮机叶片的表面前缘保护（LEP）涂层材料在一系列应变速率下显影高速瞬态压力积聚和随后的弛豫。如工作频率范围内的应力 - 应变涂层LEP行为取决于特定的LEP和材料和操作条件，如本研究中的本研究中所述。耐磨疲劳失效分析，基于Springer模型，需要涂层和基板速度的声音测量作为恒定输入材料参数。它考虑对滴落载荷进行液滴载荷的聚合物的线性弹性响应，但不考虑所涉及的材料的频率依赖性粘弹性效应。该模型已广泛使用和验证在文献中，以针对不同的液体影响侵蚀问题。在这项工作中，显示了具有超声技术的粘弹性材料性能的适当定义。广泛用于在薄涂层和层压板中发出精确测量。它还允许精确地评估弹性模量并在高频率下评估机械性能。在目前的工作中，由于合适的材料阻抗定义，已经进行了对各种LEP涂层应用案例的调查，并与雨水侵蚀耐久性因子相关。与雨侵蚀测试相比，已经评估了预测磨损表面侵蚀的提出的数值程序，以鉴定合适的涂层和复合衬底组合。 LEP侵蚀性能在雨侵蚀测试（RET）技术中广泛用于风力行业作为关键指标，旨在评估不同材料和涉及的操作参数的响应。

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