轮缘驱动潮流能发电机气隙内海水磁流体效应及多场耦合机理研究

As a new kind of marine power technology, Rim-driven marine current power system has some promising advantages such as compact structure, high efficiency and high reliability. As the air-gap is fully immerged into sea-water, there exists the magnetic fluid effect and the cross-coupling of the multi-physics in the air gap. The coupled phenomenon which relates to electricity, magnetism, hydrodynamics and thermodynamics has a great influence on the generator characteristics and the design of air-gap. However, its basic theory and design are immature at present. In this project, we will investigate the multi-physics coupled mechanisms and the design methods for the air-gap of rim-driven generators. Firstly, a numerical simulation method is used to analyze the strong coupling characteristics of the fluid in the generator air gap, and study the magnetic fluid effect in the air-gap. Then the multi-physics coupling mathematical model is established to explore the mechanism of multi-physics coupling in the air gap. Finally, the analysis and design theory of the key parameters of the rim-driven generator will be formed, and the prototype will be optimized by the experimental research. The research goals of the project are to reveal the inherent laws of air-gap multi-physics in rim-driven generators, provide fundamental basis of theoretic analysis and efficient engineering design guidance for rim-driven marine current power systems. And also, it will promote the research and application process of marine power technologies.

轮缘驱动潮流能发电装置是一种新型的海洋能发电技术，机组将发电机与叶轮一体化集成设计，具有结构紧凑、效率高、可靠性高等优点。由于可导电的海水可以在轮缘发电机气隙内自由流动，气隙内存在海水磁流体效应及多物理场交叉耦合，轮缘发电机气隙设计和输出性能对电、磁、流体、温度及其相互间的强耦合作用更为敏感，但目前其基础理论和设计理论尚不成熟。本课题针对轮缘发电机气隙内海水磁流体效应及多场耦合机理展开研究。首先采用数值仿真方法分析发电机气隙内流体-电磁双向强耦合特性，研究气隙内海水磁流体效应；然后建立轮缘发电机气隙内多场耦合数学模型，探究电机气隙内部多场耦合机理；最后，形成轮缘发电机气隙关键参数分析及设计理论，并优化改进已有样机开展实验研究。课题的研究目标是揭示轮缘发电机气隙多场耦合内在规律，为高效大型的轮缘驱动潮流能发电系统的研究提供理论分析基础和工程设计指导，推动海洋潮流能发电技术的研究和应用进程。

轮缘驱动潮流能发电装置是一种新型的海洋能发电技术，机组将发电机与叶轮一体化集成设计，具有结构紧凑、效率高、可靠性高等优点。由于可导电的海水可以在轮缘发电机气隙内自由流动，气隙内存在多物理场交叉耦合，轮缘发电机气隙设计和运行参数对电、磁、流体、温度及其相互间的强耦合作用更为敏感，但目前其基础理论和设计理论尚不成熟。本课题针对轮缘发电机气隙多场耦合机理与优化设计理论展开研究。首先建立轮缘发电机气隙内多场耦合数学模型；然后，采用数值仿真分析方法研究海水磁流体效应下发电机气隙内流体-电磁双向强耦合特性；最后，结合已有样机开展实验研究。课题的研究目标是揭示轮缘发电机气隙多场耦合内在规律，形成轮缘发电机气隙关键参数分析及设计理论，为高效大型的轮缘驱动潮流能发电系统的研究提供理论分析基础和工程设计指导，推动海洋潮流能发电技术的研究和应用进程。