| 李梦瑶, 邓争志, 叶杨莎, 程一帆.基于多孔介质层的振荡水柱波能转换装置水动力性能的数值研究[J].海洋工程,2025,(2):68~80 |
| 基于多孔介质层的振荡水柱波能转换装置水动力性能的数值研究 |
| Numerical study on the hydrodynamic performance of oscillating water column wave energy converters based on porous medium layers |
| 投稿时间：2024-02-28 |
| DOI：10.16483/j.issn.1005-9865.2025.02.007 |
| 中文关键词: OpenFOAM 振荡水柱 多孔介质模型 非线性空气透平 线性空气透平 |
| 英文关键词:OpenFOAM oscillating water column porous medium model nonlinear air turbine linear air turbine |
| 基金项目:浙江省尖兵领雁项目（滨海城镇洪涝复合灾害预警预报与协同决策关键技术及示范应用） |
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| 中文摘要: |
| 在以往振荡水柱（oscillating water column，简称OWC）波能转换装置的数值模拟研究中，小孔或多孔介质模型常被用作能量转换过程的简化替代，但两者之间的对应关系及其差异却鲜有深入研究。利用OpenFOAM开源代码平台，基于Darcy-Forchheimer模型替代空气透平，对比了非线性和线性多孔介质模型的压降和能量耗散效果。提出一种通过OWC结构气室内的水柱位移和相对气压历时曲线来计算对应的多孔介质非线性孔隙参数的方法，得到了小孔模型开孔率与多孔介质非线性孔隙参数的一一对应关系。比较了小孔和多孔介质模型气室内自由液面、相对气压和流场情况，并且探究了多孔介质层厚度对计算结果的影响。结果表明，非线性和线性多孔介质模型的计算结果有着较大差异，非线性多孔介质模型在模拟自由液面位移和气室内相对气压等OWC波能转换装置的典型水动力特征方面与小孔模型有一样的效果，但计算效率可提高20倍左右。 |
| 英文摘要: |
| In previous numerical studies of oscillating water column (OWC) wave energy converters, small or porous medium models were often used as simplified substitutes for the energy conversion process. However, the correlation and differences between these approaches have rarely been explored in depth. Using the open-source platform OpenFOAM and based on the Darcy-Forchheimer model to replace the air turbine, this study compared the pressure drop and energy dissipation effects of nonlinear and linear porous medium models. A method for calculating the nonlinear porous parameters of a porous medium corresponding to a small-hole model was proposed, utilizing the displacement of the water column and the relative air pressure time-history curve within the OWC chamber. A one-to-one relationship between the porosity of the small-hole model and the nonlinear porous parameters was established. The study further compared the free surface displacement, relative air pressure, and flow field within the chamber for small-hole and porous medium models and investigated the impact of the porous medium layer thickness on the results. The findings indicate significant differences between the results of nonlinear and linear porous medium models. The nonlinear porous medium model achieves similar accuracy to the small-hole model in simulating key hydrodynamic characteristics of OWC devices, such as free surface displacement and chamber air pressure, while improving computational efficiency by approximately 20 times. |
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