Hoksbergen Nick, Akkerman Remko, Baran Ismet
Faculty of Engineering Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands.
Materials (Basel). 2022 Feb 3;15(3):1170. doi: 10.3390/ma15031170.
The wind energy sector is growing rapidly. Wind turbines are increasing in size, leading to higher tip velocities. The leading edges of the blades interact with rain droplets, causing erosion damage over time. In order to mitigate the erosion, coating materials are required to protect the blades. To predict the fatigue lifetime of coated substrates, the Springer model is often used. The current work summarizes the research performed using this model in the wind energy sector and studies the sensitivity of the model to its input parameters. It is shown that the Springer model highly depends on the Poisson ratio, the strength values of the coating and the empirically fitted a2 constant. The assumptions made in the Springer model are not physically representative, and we reasoned that more modern methods are required to accurately predict coating lifetimes. The proposed framework is split into three parts-(1) a contact pressure model, (2) a coating stress model and (3) a fatigue strength model-which overall is sufficient to capture the underlying physics during rain erosion of wind turbine blades. Possible improvements to each of the individual aspects of the framework are proposed.
风能领域正在迅速发展。风力涡轮机的尺寸不断增大，导致叶尖速度提高。叶片的前缘与雨滴相互作用，随着时间的推移会造成侵蚀损坏。为了减轻侵蚀，需要涂层材料来保护叶片。为了预测涂层基体的疲劳寿命，通常使用施普林格模型。当前的工作总结了在风能领域使用该模型进行的研究，并研究了该模型对其输入参数的敏感性。结果表明，施普林格模型高度依赖于泊松比、涂层的强度值和经验拟合的a2常数。施普林格模型所做的假设没有物理代表性，我们认为需要更现代的方法来准确预测涂层寿命。所提出的框架分为三个部分——（1）接触压力模型，（2）涂层应力模型和（3）疲劳强度模型——总体上足以捕捉风力涡轮机叶片雨蚀过程中的基本物理现象。针对框架的各个方面提出了可能的改进建议。
