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A family of CFD boundary conditions to simulate separation control

机译：一整套CFD边界条件来模拟分离控制

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Flow control with the aim to avoid or at least delay flow separation and thus enhance performance of rotorcraft has been a topic in various recent investigations. Increase of maximum lift combined with drag reduction in steady applications as well as improvements of lift-, drag- and pitching moment cycles in dynamic stall problems on rotor blades are of major concern. In the present study a time accurate 2D RANS solver has been modified to enable a variety of boundary conditions for the simulation of flow control problems. With rather simple code modifications it is shown that complex control devices like synthetic jet control, running belt (wall movement) or representation of special surface materials can be taken into account in a simple and straightforward manner. Systematic calculations have shown the efficiency of the present code modifications. A common turbulence model, the Spalart/Allmaras one equation model, has been used. In addition a transition model can be taken into account as well.
机译：旨在避免或至少延迟流动分离并由此提高旋翼飞机性能的流量控制已成为各种近期研究的主题。在稳定应用中，最大升力的增加与阻力的减小相结合，以及转子叶片动态失速问题中的升力，阻力和俯仰力矩周期的改进是主要关注的问题。在本研究中，已对时间精确的2D RANS求解器进行了修改，以启用各种边界条件来模拟流量控制问题。通过相当简单的代码修改，可以看出，可以以简单明了的方式考虑复杂的控制设备，例如合成射流控制，跑带（壁运动）或特殊表面材料的表示。系统的计算表明了当前代码修改的效率。使用了常见的湍流模型，Spalart / Allmaras一个方程模型。另外，也可以考虑过渡模型。

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