论文标题
Spanwise和Cross-Span涡旋对低估翅膀的升力产生的贡献：从力量分配的见解
Contribution of spanwise and cross-span vortices to the lift generation of low-aspect-ratio wings: Insights from force partitioning
论文作者
论文摘要
这项研究报告了低雷诺数在低方面矩形翅膀上流动涡流诱导的提升生产机制。我们使用一种严格的力分配方法，该方法允许估计由于机翼周围流动的不同流量特征或涡流结构而导致压力诱导的空气动力学负载。这项工作的具体重点是区分跨度和跨跨跨度涡流结构对压力诱导的升力产生的影响。我们通过这些不同的涡旋量化了机翼在机翼诱导的升力，并估计它们在机翼周围和尾流的不同区域内的影响。通过改变机翼的方向比率和攻击角，我们表明，在大多数情况下，与跨跨跨跨旋涡相比，面向跨度的涡度对总升力的贡献较小。此外，近唤醒中的跨度涡度能够在机翼上产生净负升力，这是通过分离和量化涡流核心和应变区域的影响来解释的。结果证明了力分配方法的效用，以解剖涡流主导的流动物理。
This study reports on the vortex-induced lift production mechanisms in low Reynolds number flows over low aspect-ratio rectangular wings. We use a rigorous force partitioning method which allows for the estimation of the pressure-induced aerodynamic loads due to distinct flow features or vortex structures in the flow around the wing. The specific focus of this work is on distinguishing the effect of spanwise and cross-span oriented vortex structures on pressure-induced lift production. We quantify the lift induced on the wing by these different vortices, and also estimate their influence within different regions of the flow-field around the wing and in the wake. By varying the aspect-ratio and angle-of-attack of the wing, we show that for most cases, the spanwise oriented vorticity contributes less to the total lift than cross-span oriented vortices. Furthermore, the spanwise vorticity in the near wake is capable of producing net negative lift on the wing and this is explained by separating and quantifying the influence of vortex cores and regions of strain in the wake. The results demonstrate the utility of the force partitioning method for dissecting the flow physics of vortex dominated flows.
