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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Tip vortices in the actuator line model

机译:APS-流体动力学APS部门第70届年会-活动-执行器管路模型中的尖端涡旋

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The actuator line model (ALM) is a widely used tool to represent the wind turbine blades in computational fluid dynamics without the need to resolve the full geometry of the blades. The ALM can be optimized to represent the 'correct' aerodynamics of the blades by choosing an appropriatesmearing length scale $epsilon$. This appropriate length scale creates a tip vortex which induces a downwash near the tip of the blade. A theoretical frame-work is used to establish a solution to the induced velocity created by a tip vortex as a function of the smearing length scale $epsilon$. A correction is presented which allows the use of a non-optimal smearing length scale but still provides the downwash which would be induced using the optimal length scale.
机译:致动器线模型(ALM)是一种广泛使用的工具,用于在计算流体动力学中表示风力涡轮机叶片,而无需解析叶片的完整几何形状。通过选择合适的涂抹长度尺$,可以优化ALM来表示叶片的“正确”空气动力学特性。这种适当的长度刻度会产生叶尖涡流,从而在叶片叶尖附近引起向下冲洗。使用理论框架来确定由尖端涡旋所产生的感应速度作为拖尾长度标度ε的函数的解决方案。提出了一种校正,该校正允许使用非最佳的涂抹长度标尺,但仍提供使用最佳长度标尺会引起的冲洗。

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