Abstract
The structure of the Karman vortex shed from two-dimensional bluff body placed in a fully developed turbulent pipe flow was investigated experimentally with air (mean velocity Um=10m/s, ReD=105). The ratio of the bluff body width (w) to the pipe inner diameter (D) was 0.28. Velocity fluctuations were measured at 30w downstream of the bluff body by using a triple-wire probe. The flow behaviour was analyzed through the determination of the mean velocity distribution, velocity fluctuations during the vortex shedding period, the convection velocity of the vortex street and the vorticity distribution by employing the phase averaging method. The results showed that the convection velocity of the vortex street is lower than that in the free stream. The ratio of the streamwise distance of the vortices to the transverse distance is larger than that in the free stream. And also there are two groups of high vorticity areas, whose peak values are much larger than those of Karman vortex shed in the free stream.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
