Wind Farm Large-Eddy Simulations on Very Coarse Grid Resolutions using an Actuator Line Model

Wind Farm Large-Eddy Simulations on Very Coarse Grid Resolutions using an Actuator Line Model
复制标题

使用执行器线模型对非常粗网格分辨率进行风电场大涡模拟

DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
C. Meneveau
C. Meneveau
中科院分区：
--
文献类型：
--
作者：
L. M. Tossas;R. Stevens;C. Meneveau

文献摘要

被引文献

相似文献

在这项工作中，大涡模拟中执行器线模型（ALM）的准确性 在非常粗糙的空间分辨率的特定条件下研究了风力涡轮机流动的情况。对于精细解析的条件，众所周知，与不旋转的标准执行器盘模型 (ADM) 相比，ALM 提供了更好的精度。然而，我们在此表明​​，在非常粗略的分辨率下，转子尺度处发生的流动感应会影响流动角的预测，并对 ALM 预测产生不利影响。我们首先提供粗 LES 的说明以重现风洞测量。由此产生的流量预测效果很好，但从详细的 ALM 预测功率输出的挑战促使我们对流量均匀的情况进行更详细的分析。我们提出了一个理论框架来比较进入大涡模拟的过滤量 作为体力的方程，在过滤的量和未过滤的量之间具有比例关系。该研究旨在将理论推导应用于模拟框架并改进 ALM 的当前结果，特别是在观察到最大差异的近尾流中。
In this work the accuracy of the Actuator Line Model (ALM) in Large Eddy Simula- tions of wind turbine flow is studied under the speci c conditions of very coarse spatial resolutions. For finely-resolved conditions, it is known that ALM provides better accuracy compared to the standard Actuator Disk Model (ADM) without rotation. However, we show here that on very coarse resolutions, flow induction occurring at rotor scales can a effect the predicted in flwow angle and can adversely a ect the ALM predictions. We first provide an illustration of coarse LES to reproduce wind tunnel measurements. The resulting flow predictions are good, but the challenges in predicting power outputs from the detailed ALM motivate more detailed analysis on a case with uniform in flow. We present a theoretical framework to compare the ltered quantities that enter the Large-Eddy Sim- ulation equations as body forces with a scaling relation between the filtered and unflltered quantities. The study aims to apply the theoretical derivation to the simulation framework and improve the current results for an ALM, especially in the near wake where the largest differences are observed.