A Numerical Study on Helical Vortices Induced By a Short Twisted Tape in a Circular Pipe
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- A Numerical Study on Helical Vortices Induced By a Short Twisted Tape in a Circular Pipe
- 发表刊物：
- Case Studies in Thermal Engineering
- 摘要：
- Helical vortices, as one kind of secondary flows, are recently observed downstream of the short twisted tape. The behaviors of vortices, which have significant effects on the efficiency of twisted tape, are not well understood. As such, the formation and development of helical vortices induced by the short twisted tape are studied numerically. The results show that two symmetrical stable helical vortices are present downstream of the twisted tape. The values of radial velocities cannot be neglected due to the presence of the vortices. The vortices form in the twisted tape and remain the structure downstream of the twisted tape. Torsion promotes the formation of helical vortices. The intensities of helical vortices decay along the streamwise direction. With the increasing Reynolds numbers, the intensities of helical vortices increase, and the trend is in agreement with the swirl intensities. The intensities of helical vortices decay slowly compared with the intensities of swirling flow.
- 合写作者：
- Liu Wen, Bai Bofeng*
- 卷号：
- 5
- 页面范围：
- 134-142
- 是否译文：
- 否
- 发表时间：
- 2015-03-14