Abstract
The flow visualization and the measurement of velocity fluctuations in the streamwise and the spanwise directions were carried out for in-line fin arrays. It was observed that the streakline becomes unstable and bends in the wake of a fin in the middle range of the Reynolds number and that the streakline bend exhibits a hook-shaped pattern in the neighbourhood of the leading edge of the downstream fin. The destabilized flow suggested by the presence of these unstable streaklines was estimated to cause the velocity fluctuation of fluid near the fins. The same flow visualization was performed for 5-row offset fin arrays. However, it was found that wake flow instability is promoted as the fin pitch becomes narrower and that the flow near a fin interacts and is synchronized with those of neighbouring fins. The frequency of appearance of the bend of a streakline is found to depend mainly on the fin pitch .
Sign-in/Register to access full text options 
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.
