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首页> 外文期刊>International Journal of Heat and Fluid Flow >Contribution to improved eddy-viscosity modeling of the wind turbine - to - wake interactions
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Contribution to improved eddy-viscosity modeling of the wind turbine - to - wake interactions

机译：有助于改进风力发电机的涡流-尾流相互作用的建模

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In the present study, we focus on testing, validation and comparative assessment of different modeling strategies for numerical simulations of the wind turbine wake interactions under neutrally stratified atmospheric conditions. The final goal of our investigation is to propose a numerically robust and a relatively simple, but sufficiently accurate turbulence model, which will be able to predict the correct behavior of wind turbine wake interactions in complex terrains or within urban areas. In this work, we adopted the actuator disk model (ADM) to represent wind turbine blades effects. The non-rotational and rotational actuator disk models are implemented in our in-house code, which was previously extensively tested and validated against a series of environmental studies in both laboratory and full-scale applications (including effects of complex orography/terrain, thermal stratification, vegetation, arrays of urban buildings). We reviewed sets of existing RANS two-equation based models with specific extensions for the wind turbine wake regions and selected two of the currently most-used models for simulations of wind turbines. To strengthen the physics of the flow foundation of modified BANS-type k - epsilon models for wind turbine effects, we propose an improved model based on Durbin's time-limiter concept. A comparative assessment of turbulence models is performed on a series of test cases that include the real- and laboratory-scale single and multiple horizontal axis wind turbines for which detailed experimental measurements are available. The proposed variant of the model provided results in good agreement with measurements, without any additional adjustments of the empirical input, and outperformed the currently mostly used models in wind engineering. The proposed model is recommended for future use in optimization studies of the wind turbine placement in the complex urban areas, and eventually, for improving layouts of wind farms.
机译：在本研究中，我们专注于在中性分层大气条件下对风机尾流相互作用进行数值模拟的不同建模策略的测试，验证和比较评估。我们研究的最终目标是提出一个数值健壮且相对简单但足够准确的湍流模型，该模型将能够预测复杂地形或市区内风力涡轮机尾流相互作用的正确行为。在这项工作中，我们采用了执行器盘模型（ADM）来表示风力涡轮机叶片的效果。非旋转和旋转执行器盘模型是在我们的内部代码中实现的，该内部代码先前已在实验室和大规模应用中经过一系列环境研究（包括复杂的地形/地形，热分层的影响）进行了广泛的测试和验证，植被，城市建筑物阵列）。我们回顾了现有的基于RANS二方程的模型，并针对风力涡轮机尾流区域进行了特定扩展，并选择了两个当前最常用的模型来模拟风力涡轮机。为了加强改进的BANS型k-epsilon模型对风力涡轮机效应的流动基础的物理作用，我们提出了一种基于Durbin时限概念的改进模型。在一系列测试案例中对湍流模型进行了比较评估，其中包括实际规模和实验室规模的单轴和多轴水平风力涡轮机，这些风力涡轮机可获得详细的实验测量结果。该模型的拟议变体提供的结果与测量结果非常吻合，而无需对经验输入进行任何其他调整，并且胜过了当前在风力工程中最常用的模型。建议将该模型用于将来在复杂市区的风力涡轮机布置的优化研究中使用，并最终用于改进风电场的布局。

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