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首页> 外文期刊>Journal of visualization >Experimental investigation on the streamwise vortex-surface interaction
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Experimental investigation on the streamwise vortex-surface interaction

机译：流动涡流互动的实验研究

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摘要

Interaction of a vortex with a blade, wing or fin may involve both rapid distortion of the incident vorticity field and unsteady flow near the surface. A variety of flow visualization methods were applied in the experiment to observe the change of flow characteristics during a streamwise vortex-surface interaction. Particle image velocimetry measurements were carried out on a 2-D flow field in the near-wall area. The topology structure of the flow field during the vortex-surface interaction was obtained. The near-wall vorticity layer caused by the primary vortex formed secondary vortex. The initial strength of the incident vortex and distance between vortex core and the surface are the main parameters that affect the characteristics of flow field. The relevant results will help further study on the mechanism of interaction.
机译：涡旋与刀片，翼或翅片的相互作用可能涉及入射涡度场的快速变形，并且在表面附近的不稳定流动。在实验中应用了各种流动可视化方法，以观察流动涡流表面相互作用期间的流动特性的变化。在近壁区域的2-D流场上进行粒子图像速度测量。获得了涡旋表面相互作用期间流场的拓扑结构。由初级涡流形成的次级涡流引起的近壁涡度层。入射涡流的初始强度和涡旋芯与表面之间的距离是影响流场特征的主要参数。相关结果将有助于进一步研究互动的机制。

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