Revisiting the wake-triggered secondary vortices over a circular-cylinder/flat-plate configuration
Revisiting the wake-triggered secondary vortices over a circular-cylinder/flat-plate configuration
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DOI：
10.1063/5.0193239
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发表时间：
2024-02
影响因子：
4.6
通讯作者：
Jiangsheng Wang;Guosheng He;Jinjun Wang
中科院分区：
文献类型：
--
作者：
Jiangsheng Wang;Guosheng He;Jinjun Wang
尾涡/边界层相互作用对流体力学的基础和实际方面都具有重要意义。尾涡触发了著名的单二次涡在一个典型的圆柱/平板配置。然而，最近的研究报告了多段翼型或简化的圆柱/翼型配置上的尾流触发的双二次涡。受此启发，本文重新审视了这个问题与圆柱/平板配置，并最终观察到双二次涡的边界层。与尾涡脱落频率及其二次谐波相关的扰动穿透边界层后被进一步放大，形成双二次涡。
The wake-vortex/boundary-layer interaction is significant for both fundamental and practical aspects of fluid mechanics. The wake vortex triggered the well-known single-secondary vortex over a canonical circular-cylinder/flat-plate configuration. However, recent investigations reported wake-triggered double-secondary vortices over a multi-element airfoil or a simplified circular-cylinder/airfoil configuration. Motivated by this contrast, this paper revisits this topic with a circular-cylinder/flat-plate configuration and finally observes the double-secondary vortices in the boundary layer. The disturbances related to the shedding frequency of the wake vortex and its second harmonic are found to penetrate the boundary layer and be further amplified to form the double-secondary vortices.