Periodic vortex shedding over delta wings
Periodic vortex shedding over delta wings
复制标题
三角翼上的周期性涡旋脱落
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
D. Telionis
中科院分区：
文献类型：
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作者：
O. Rediniotis;H. Stapountzis;D. Telionis
同样，边缘几乎是平行的，除了细胞的形成之外，尾迹以近乎二维的方式组织起来。在这里讨论的问题中，边缘形成30度的角度，而且它们相对于流动是倾斜的。关于这个问题的初步发现由本作者在简短的注释中发表。18 对斯特劳哈尔数随攻角和雷诺数的变化进行了部分研究。当前工作的主要目标是探索有组织的自然振荡的流场并确定其特征。现在以热线信号对的形式记录了两种不同脱落模式（同时和交替）的存在。针对整个脱落迎角域（35 < a < 90 度），研究了每个模型中存在的迎角范围。研究了脱落涡流相对于机翼的方向及其随时间的演变。最后，流程可视化技术被用来支持早期的发现。
again the edges were nearly parallel, and except for the formation of cells, the wakes organized themselves in a nearly twodimensional fashion. In the problem under discussion here, the edges form an angle of 30 deg, and moreover they are inclined with respect to the flow. Preliminary findings on this problem were published by the present authors in a short Note.18 The variation of the Strouhal number vs the angle of attack and the Reynolds number was partially investigated. The main thrust in the present effort is to explore the flowfield for organized natural oscillations and to identify their character. The existence of two different shedding modes (simultaneous and alternate) is now documented in terms of pairs of hot-wire signals. The angle-of-attack ranges in which each models present are investigated for the entire domain of shedding angles of attack (35 < a < 90 deg). The orientation of the shed vortices with respect to the wing and their evolution in time are studied. Finally, flow visualization techniques are used to support the earlier findings.