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Preliminary analysis of Ice Accretion Prediction on Wind Turbine Blades

机译:风力涡轮机叶片结冰预测的初步分析

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Most of the well formulated ice prediction models are capable of predicting rime ice accurately due to its smooth profile. However, glaze ice comprises of horn-ice and feathers which makes it more difficult to predict. Therefore, the aim of the present study is to develop a numerical methodology to predict glaze ice formation on NREL S809 wind turbine blade airfoil. Research shows that ANSYS FENSAP-1CE is the most suitable commercially available software for ice prediction. Hence, the goal of this research is to explore different solver setup conditions on DROP3D and ICE3D modules within FENSAP-ICE and investigate how each of the variables affect the final ice shape. Results from this investigation would enhance the understanding of the solver and help propose the best practice set-up which would be used in the subsequent research on parametric analysis involving glaze ice prediction. Flow conditions from existing wind turbine blade experiment was used for simulation and validation purposes. Over 60 different set-up conditions were tested and validated for this study but only four best cases are presented and examined in this paper based on the ice location, shape and size. Results show that Case 37 with; SLD by body forces splashing and break-up model, Gravity vector of 9.81m/s2 in the Y-axis applied to both DROP3D and ICE3D module, beading enabled in ICE3D module, using six multi-shots proved to be the most accurate set-up for glaze ice.
机译:精心制定的大多数冰预测模型由于其平滑的轮廓而能够准确地预测霜冰。然而,釉冰由角冰和羽毛组成,这使其更难以预测。因此,本研究的目的是开发一种数值方法来预测NREL S809风力涡轮机叶片翼型上的结冰。研究表明,ANSYS FENSAP-1CE是最合适的冰预测商业软件。因此,本研究的目的是探索FENSAP-ICE中DROP3D和ICE3D模块上不同的求解器设置条件,并研究每个变量如何影响最终的冰形。这项调查的结果将增进对解算器的理解,并有助于提出最佳实践设置,并将其用于随后的涉及釉冰预测的参数分析研究中。现有风力涡轮机叶片实验的流动条件用于仿真和验证目的。本研究测试和验证了60多种不同的设置条件,但本文仅根据冰的位置,形状和大小介绍和检查了四种最佳情况。结果表明,案例37具有;通过体力飞溅和破裂模型进行SLD,将Y轴上的重力矢量9.81m / s2应用于DROP3D和ICE3D模块,并在ICE3D模块中启用了串珠功能,使用六次多次射击被证明是最准确的设置-准备上釉冰。

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