Session: 09-03-01 Tidal Energy: Design and Innovation

Paper Number: 126380

126380 - Investigation on Flow-Induced Rotation of Coupled Double Cylinders Arranged in Tandem 

The flow-induced rotation of coupled double cylinders in tandem has rarely been investigated in existing studies. In this paper, the theoretical basis of flow-induced rotation was established, the experimental setup was established and verified. Based on the test data, the characteristics of flow-induced rotation of coupled double cylinder arranged in tandem were investigated, and the energy conversion capacity was evaluated. The study aims to provide reference for the design of the flow-induced vibration energy conversion equipment. The main experimental conclusions can be summarized as follows: The oscillation response of coupled double cylinders arranged in tandem is vortex-induced vibration (VIV). When the spacing ratio is 4, the amplitude is the smallest and a "second wave peak" appears in the lower branch of VIV. When the spacing ratio is 6, the amplitude is largest, and the maximum amplitude ratio A^* is 0.92; when the spacing ratio is 8, the locking-interval is largest;When the stiffness of the rotational system exceeds a certain limit, the higher stiffness value would not take advantage of the transformation of the wake mode of the cylindrical vibrator, which would hinder the transformation between the branches of VIV and make the oscillation system more inclined to maintain the original vibration mode.

Presenting Author: Weipeng Feng Tianjin University

Presenting Author Biography: Weipeng Feng, Doctoral candidate in Ocean Engineering, has been devoted to research in Flow-induced Motion and Tidal Energy.

Authors:

Weipeng Feng Tianjin University
Xu Yang Tianjin University of Technology
Xiang Yan Tianjin University
Lingfan Li Tianjin University