The effect of a screen shroud on vortex-induced vibration of a circular cylinder and its wake characteristics

• Published in: Proceedings of the International Offshore and Polar Engineering Conference
• Main Author: Azmi A.M.; Zhou T.; Zhou Y.; Chen J.; Cheng L.
• Format: Conference paper
• Language: English
• Published: International Society of Offshore and Polar Engineers 2015
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84944685341&partnerID=40&md5=9634a4e486616ab72f7c4db57c47b738

This paper aims to investigate the effect of a screen cylinder on vortex-induced vibration (VIV) of a circular cylinder and to understand the wake characteristics behind the shrouded cylinder using a high porosity (67%) screen mesh. The diameter ratio between the screen cylinder and the solid cylinder is 2. VIV test is conducted first and phase-averaged analysis is used later to examine the vortex structures at x/d = 5-40 in a wind tunnel. It is found that the screen shroud can suppress VIV by about 78%. Phase-averaged analysis of the shrouded cylinder at a low Reynolds number, however, showed a substantial vortex development with significant strength of the coherent structures. Copyright © 2015 by the International Society of Offshore and Polar Engineers (ISOPE).