Analysis of Fluid-Structure Coupling Energy Transfer Characteristics Slender Structure with Variable Cross-Section at Low Reynolds Number

doi:10.16183/j.cnki.jsjtu.2022.133

Journal of Shanghai Jiao Tong University ›› 2023, Vol. 57 ›› Issue (11): 1400-1409.doi: 10.16183/j.cnki.jsjtu.2022.133

Special Issue: 《上海交通大学学报》2023年“船舶海洋与建筑工程”专题

• Naval Architecture, Ocean and Civil Engineering • Previous Articles Next Articles

Analysis of Fluid-Structure Coupling Energy Transfer Characteristics Slender Structure with Variable Cross-Section at Low Reynolds Number

DENG Xiubing¹(), YU Yuemin², PANG Xiyuan³

1. Zhejiang Design Institute of Water Conservancy and Hydro-Electric Power Co., Ltd., Hangzhou 310000, China
2. School of Civil and Architectural Engineering, Hainan University, Haikou 570228, China
3. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2022-04-29 Revised:2022-07-04 Accepted:2022-07-12 Online:2023-11-28 Published:2023-12-01

Abstract

Abstract:

The wavy deformed cross-section cylindrical structure has excellent properties of drag reduction in fluid flow, but the flow-induced vibration characteristics of flexible structure with such variable cross-section are still unclear. In this paper, based on the high-performance spectral element method, a fluid-structure coupled mechanistic model and a numerical algorithm for slender structures are established. The wake characteristics, structural dynamic responses, energy transfers, and spanwise variations of vortex shedding frequencies are discussed. The numerical simulation results show that slender structure with the wavy-deformed cross-section can greatly suppress the vortex-induced vibration response at an appropriate cross-section disturbance wave height, and the special vortex structure formed on both sides of the wavy-shaped slender structure can stabilize the flow around the shear layer and elongate the vortex formation length, thereby reducing the fluid-structure coupling effect between the wake structure and the slender structure, and suppressing the vortex-induced vibration response.

Key words: wavy cross-section, fluid-induced vibration, slender structure

CLC Number:

O351.3

DENG Xiubing, YU Yuemin, PANG Xiyuan. Analysis of Fluid-Structure Coupling Energy Transfer Characteristics Slender Structure with Variable Cross-Section at Low Reynolds Number[J]. Journal of Shanghai Jiao Tong University, 2023, 57(11): 1400-1409.

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Analysis of Fluid-Structure Coupling Energy Transfer Characteristics Slender Structure with Variable Cross-Section at Low Reynolds Number

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