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首页> 外文期刊>International Journal of Heat and Fluid Flow >Aerodynamic characterization of the wake of an isolated rolling wheel
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Aerodynamic characterization of the wake of an isolated rolling wheel

机译：隔离式滚轮尾流的气动特性

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The flow around the wheels of road vehicles exhibits complex unsteady 3D phenomena, including massive boundary layer separations, recirculation areas and 3D vortical structures. Although the mechanisms generating the wake main vortices have been identified, their exact topology is still indeterminate and a description of their unsteady evolution has not yet been proposed. The aim of this paper is to characterize the structure and unsteady motion of an isolated wheel wake. For this purpose, wind tunnel investigations have been carried out with a smooth rotating wheel in contact with a moving belt and compared to URANS simulations based on the geometry used for experiments. CFD calculations appeared to have successfully predicted the main features of the flow. Particle Image Velocimetry and hot-wire anemometry measurements coupled with numerical simulation results enabled the origin and the nature of the main vortical structures in the near-wake to be confirmed and their unsteady behaviour to be investigated. The results show good agreement with previous knowledge and provide new insight into the unsteady features of the wake.
机译：公路车辆车轮周围的气流表现出复杂的不稳定3D现象，包括大量的边界层分离，回流区域和3D涡旋结构。尽管已经确定了产生尾流主旋涡的机制，但是它们的确切拓扑仍然不确定，并且尚未提出对它们的不稳定演变的描述。本文的目的是描述孤立的车轮尾迹的结构和非定常运动。为此，在光滑的旋转轮与运动带接触的情况下进行了风洞研究，并将其与基于实验的几何形状的URANS仿真进行了比较。 CFD计算似乎已成功预测了流量的主要特征。粒子图像测速和热线风速测量与数值模拟结果相结合，可以确定近尾流中主要涡旋结构的起源和性质，并可以研究它们的非稳态行为。结果表明与先前的知识有很好的一致性，并为尾流的不稳定特征提供了新的见解。

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