Vortex Induced Vibration - Investigate on the VIV characteristics by changing afterbody length of a cylinder

Lim, Jia Zheng (2019) Vortex Induced Vibration - Investigate on the VIV characteristics by changing afterbody length of a cylinder. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

A series of past research and studies have been discussed on the vortex induced vibration where most of the article was using perfect cylinder bodies (radius of the cylinder is same). This project is conducted to investigate how the afterbody length of a cylinder body affect the amplitude response, vortex formation and observe if any new vortex mode been created. An experiment that will be conduct to test on different afterbody radius of the cylinder ranged from original 10mm, with the range of 0 to 20mm with each increment or decrement of 5mm. the Reynold number will be in the range of 4700 to 7600, flow is turbulent. The mass-damping ratio m*ζ and the length of the beam, L=64mm will also remain constant. This particular test will be carry out in water for low mass ratio instead of in the air. Then a Computational Fluid Dynamic (CFD) analysis will be carry out using ANSYS to double verify the results of the experiment which will use to compare and discuss later. This study included both of the analytical and numerical approach.