考虑质量比影响的串列双圆柱涡激振动发电装置三维数值模拟研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (14) : 8-17.

论文

考虑质量比影响的串列双圆柱涡激振动发电装置三维数值模拟研究

王家正1，孙洪源1，林海花1，徐强2，刘德鑫1，苗瑾1

作者信息 +

Numerical simulation study on a dual-cylinder vortex-induced vibration power generation device considering the influence of mass ratio

WANG Jiazheng1，SUN Hongyuan1，LIN Haihua1，XU Qiang2，LIU Dexin1，MIAO Jin1

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文章历史 +

摘要

双圆柱涡激振动发电装置是一种利用海流能发电的新型能源装置。本文使用Fluent模拟了双圆柱涡激振动发电装置的水动力特性。利用UDF和动网格技术实现了圆柱振子的流固耦合模拟，分析圆柱振子的涡激振动特性。本文首先进行了网格和时间步长的无关性验证，证明了该数值模拟的准确性；其次，从位移时程曲线、幅值、频率等三个方面分析圆柱振子的涡激振动特性。通过对等质量比下串列双圆柱涡激振动发电装置圆柱振子的获能功率及能量转换效率的分析，研究质量比对双圆柱涡激振动发电装置的俘获能特性的影响。研究表明：在质量比为m*=3、4、5的下游圆柱的横流向振幅随约化速度的增加而逐渐大于上游圆柱的横流向振幅；不同质量比下的双圆柱振子的横流向无量纲振幅均呈现随约化速度的增加而增加后又减小的趋势；质量比m*=4时，上、下游圆柱的能量转换效率最高，分别为32.6%、22.8%；在质量比m*=5时，下游圆柱的能量转换效率最高，为30.5%。

Abstract

The tandem circular cylinder vortex-induced vibration power generation device is a novel energy device that harnesses the power of ocean currents for electricity generation. In this paper, Fluent was used to simulate the hydrodynamic characteristics of the tandem circular cylinder vortex-induced vibration power generation device. The flow-structure coupling simulation of the cylinder oscillator was achieved using UDF and dynamic mesh technology to analyze the vortex-induced vibration characteristics of the cylinder oscillator. This paper first conducted grid and time step independence verification to demonstrate the accuracy of the numerical simulation. Subsequently, the vortex-induced vibration characteristics of the cylinder oscillator were analyzed from three aspects: displacement time history, amplitude, and frequency. Through the analysis of the energy harvesting power and energy conversion efficiency of the cylinder oscillator in a tandem circular cylinder vortex-induced vibration power generation device with equal mass ratio, the energy capture characteristics of the tandem circular cylinder vortex-induced vibration power generation device were studied. The research indicates that for downstream cylinders with a mass ratio of m*=3, 4, and 5, the transverse amplitude gradually becomes greater than that of the upstream cylinder with an increase in reduced velocity. The dimensionless transverse amplitude of the tandem circular cylinder oscillators under different mass ratios shows a trend of increasing with the increase in reduced velocity and then decreasing. When the mass ratio is m*=4, the energy conversion efficiency of the upstream and downstream cylinders is the highest, at 32.6% and 22.8%, respectively. When the mass ratio is m*=5, the energy conversion efficiency of the downstream cylinder is the highest, at 30.5%.

导出引用

王家正1, 孙洪源1, 林海花1, 徐强2, 刘德鑫1, 苗瑾1. 考虑质量比影响的串列双圆柱涡激振动发电装置三维数值模拟研究[J]. 振动与冲击, 2024, 43(14): 8-17

WANG Jiazheng1, SUN Hongyuan1, LIN Haihua1, XU Qiang2, LIU Dexin1, MIAO Jin1. Numerical simulation study on a dual-cylinder vortex-induced vibration power generation device considering the influence of mass ratio[J]. Journal of Vibration and Shock, 2024, 43(14): 8-17

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