不同干扰下串列双PTC圆柱的振动及功率稳定性研究

章大海; 张帅; 刘硕硕; 侯啸海; 江耀鑫

doi:10.21656/1000-0887.450338

不同干扰下串列双PTC圆柱的振动及功率稳定性研究

doi: 10.21656/1000-0887.450338

中国石油大学(华东) 新能源学院，山东青岛 266580

基金项目:

山东省自然科学基金 ZR2023ME036

详细信息

通讯作者:
章大海(1978—)，男，副教授，博士(通信作者. E-mail: dhzhang@upc.edu.cn)

中图分类号: O3575; TV131.2
计量
- 文章访问数: 14
- HTML全文浏览量: 11
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2024-12-24
- 修回日期: 2025-03-09
- 刊出日期: 2026-02-01

Study on Vibration and Power Stability of Tandem Double PTC Cylinders Under Different Perturbations

College of New Energy, China University of Petroleum (East China), Qingdao, Shangdong 266580, P.R.China

摘要

摘要: 发展海洋能符合国家的“双碳”战略目标，大规模利用VIVACE提取海流能时需要多振子协同组合发电，但多振子的干扰效应会形成比较紊乱的流场，造成VIVACE振动响应不稳定. 为此，提出刚性连接结构以解决多振子流致振动造成的干扰. 利用RANS方法和Spalart-Allmaras湍流模型，结合动网格和UDF技术，模拟分离式串列双PTC圆柱和刚性连接双PTC圆柱在L=1.5D，L=2.5D，L=3.5D三种间距比下的流致振动响应、振动稳定性及瞬时输出功率稳定性. 结果表明，间距比增加会使得刚性连接时振动幅值稳定性减小，与分离式相比较，在三种间距比下刚性连接均可以改善振动稳定性和瞬时输出功率稳定性，但改善效果随着间距比增加而减弱；引入净阻尼系数衡量分离式串列双PTC圆柱和刚性连接串列双PTC圆柱振动过程中的系统能量变化，发现不稳定的净阻尼系数会导致系统能量的不稳定最终形成振动响应的不稳定.
- 流致振动 /
- 串列双PTC圆柱 /
- 净阻尼系数 /
- 振动稳定性
Abstract: The development of ocean energy aligns with the national dual-carbon strategy objectives. The large-scale utilization of VIVACE devices to extract ocean current energy requires the coordinated power generation of multiple oscillators. However, the perturbation effects among multiple oscillators can create a relatively chaotic flow field, resulting in unstable vibration responses of the VIVACE device. To address this issue, a rigid connecting structure was proposed to mitigate the perturbation caused by flow-induced vibrations. With the RANS method and the Spalart-Allmaras turbulence model, combined with the dynamic meshing and the UDF technology, the flow-induced vibration responses, vibration stability, and instantaneous output power stability of separated serial twin PTC cylinders and rigidly connected twin PTC cylinders were simulated under 3 spacing ratios: L=1.5D, L=2.5D, and L=3.5D. The results indicate that, in the rigidly connected case, the vibration amplitude stability will decrease with the spacing ratio. Compared to the separated configuration, the rigidly connected setup has higher vibration stability and instantaneous output power stability as well under all 3 spacing ratios, although the improvement effect diminishes as the spacing ratio increases. A net damping coefficient was introduced to assess the energy changes in the system during the vibration process of the separated serial twin PTC cylinders and the rigidly connected serial twin PTC cylinders. The results show that, an unstable net damping coefficient leads to unstable energy in the system, ultimately resulting in unstable vibration responses.
- flow induced vibration /
- tandem double PTC cylinders /
- net damping factor /
- vibration stability

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图 1 系统物理模型

Figure 1. The physical model for the system

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图 2 计算区域模型

Figure 2. The calculation domain model

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图 3 计算域网格及PTC圆柱近壁面网格

注为了解释图中的颜色，读者可以参考本文的电子网页版本，后同.

Figure 3. Calculation domain meshes and PTC cylindrical near-wall meshes

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图 4 串列PTC圆柱振幅比

Figure 4. The tandem PTC cylindrical amplitude ratio

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图 5 不同间距比下不同连接方式振幅响应

Figure 5. Amplitude responses of different connection methods at different spacing ratios

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图 6 不同间距比下不同连接方式频率响应

Figure 6. Frequency responses of different connection methods at different spacing ratios

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图 7 不同间距比下不同连接方式的平均功率

Figure 7. The average powers of different connection methods at different spacing ratios

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图 8 分离结构不同间距比的瞬时功率(U_r=16)

Figure 8. Instantaneous powers with different spacing ratios of the separation structure (U_r=16)

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图 9 刚性连接不同间距比的瞬时功率(U_r=14)

Figure 9. Instantaneous powers with different spacing ratios under rigid connections (U_r=14)

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图 10 不同间距比下不同连接方式的瞬时功率稳定性

Figure 10. Instantaneous power stabilities of different connection methods at different spacing ratios

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图 11 分离结构PTC圆柱不同时刻尾涡(L=1.5D, U_r=12)

Figure 11. Tail vortices of separation PTC cylinders at different moments (L=1.5D, U_r=12)

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图 12 刚性连接串列双圆柱不同时刻尾涡(L=1.5D, U_r=12)

Figure 12. Tail vortices of rigid connection PTC cylinders at different moments (L=1.5D, U_r=12)

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图 13 分离式振子振动过程中的净阻尼系数(U_r=5)

Figure 13. Net damping coefficients of the separated type during vibration (U_r=5)

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图 14 上游PTC圆柱与下游PTC圆柱净阻尼系数(U_r=18, L=1.5D)

Figure 14. Net damping coefficients of upstream PTC cylinder and downstream PTC cylinders (U_r=18, L=1.5D)

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图 15 刚性连接振动过程中的净阻尼系数

Figure 15. Net damping coefficients of the rigid connection during vibration

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图 16 分离式连接和刚性连接的净阻尼系数(U_r=18, L=1.5D)

Figure 16. Net damping coefficients of the separated and rigid connections (U_r=18, L=1.5D)

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表 1 VIVACE结构参数

Table 1. VIVACE structural parameters

parameter	value
cylindrical diameter/mm	88.9
vibration mass/kg	7.286
cylinder length/m	0.914
generation damping/(N·s/m)	13.97
structural damping/(N·s/m)	3.49
vibration stiffness/(N/m)	600
natural frequency/Hz	1.093 5
water density/(kg/m³)	999.729
kinematic viscosity/(N·s/m)	0.001 004
dynamic viscosity	9.940E-7
turbulence intensity/%	0.095

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