Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2025 , Vol. 59 >Issue 8: 1067 - 1080

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2023.539

Naval Architecture, Ocean and Civil Engineering

Experimental Study on Vortex-Induced Vibration Force Characteristics of Side-by-Side Double Free-Hanging Water Transmission Pipes Under Uniform Flow

  • ZHAO Guangyi ,
  • ZHANG Mengmeng ,
  • FU Shixiao ,
  • XU Yuwang ,
  • REN Haojie ,
  • BAI Yingli
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  • State Key Laboratory of Ocean Engineering; School of Ocean and Civil Engineering; Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration; Institute of Polar and Ocean Technology, Shanghai Jiao Tong University, Shanghai 200240, China

Received date: 2023-10-20

  Revised date: 2023-12-13

  Accepted date: 2023-12-26

  Online published: 2024-01-09

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Abstract

This paper investigates vortex-induced vibration (VIV) characteristics of double free-hanging water transmission pipes, which are crucial for temperature difference energy harvesting platforms. Compared to a single pipe, double pipes could offer higher transport efficiency and cost-effectiveness. In this paper, model experiments were conducted to analyze VIV characteristics of the double free-hanging pipes and a method for identifying vortex-induced loads for large displacements and small deformations was proposed. A comparative analysis of the VIV characteristics of double free-hanging pipe and the single pipe was performed. The findings show that VIV displacement amplitudes of double free-hanging pipe are similar at low flow velocities but differ with those of single pipe at high velocities. The double free-hanging pipe is more prone to instability in VIV, including traveling waves and multi-frequency responses. The VIV frequencies of double free-hanging pipe can be predicted by the same Strouhal number as that of the single pipe. Additionally, a significant difference in the added mass coefficient affects natural wet frequency adjustment for VIV resonance.

Key words： free-hanging pipe; vortex-induced vibration (VIV); vortex-induced force; model test

Cite this article

ZHAO Guangyi , ZHANG Mengmeng , FU Shixiao , XU Yuwang , REN Haojie , BAI Yingli . Experimental Study on Vortex-Induced Vibration Force Characteristics of Side-by-Side Double Free-Hanging Water Transmission Pipes Under Uniform Flow[J]. Journal of Shanghai Jiaotong University, 2025 , 59(8) : 1067 -1080 . DOI: 10.16183/j.cnki.jsjtu.2023.539

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