三维竖轴潮流水轮机水动力性能研究

竖轴水轮机作为潮流能转换为电能的核心装置,其水动力性能的优劣将会直接影响到整体发电系统的效率。为了研究大型竖轴水轮机叶片安装角对水轮机水动力性能的影响,基于多参考系模型(MRF),采用Fluent软件对流场中的模型进行3D数值模拟。在转速和来流速度保持不变,改变安装角时,分析同种翼型5个不同安装角叶片对潮流能水轮机的水动力性能的影响。同时分析在同一安装角和旋转速度条件下,不同来流速度对水轮机水动力性能的影响。结果表明,叶片安装角对竖轴潮流水轮机的能量利用率影响较大,来流速度对水轮机叶片表面的静压力和输出功率具有一定的影响。研究结果对今后竖轴水轮机的设计和生产具有借鉴意义。

On hydrodynamic performance of three dimensional vertical shaft tidal current turbine

Vertical shaft turbine is the core device of the tidal energy conversion to electric energy, and its hydrodynamic performance will directly affect the efficiency of the whole power system. The 3D numerical simulation for the model in the flow field is carried out by Fluent with the multi reference system model (MRF) to research the influence of the installation angle of the large vertical shaft turbine blade on the hydrodynamic performance of the turbine. The influence of the blade installation angle on the hydrodynamic performance of the tidal current energy turbine is analyzed with five different blade installation angle but the same foil shape by keeping constant rotating speed and flow rate. The influence of inflow velocity is also analyzed with different rotating velocities but the same installation angle. The results show that the blade installation angle has a great influence on the energy utilization rate of the vertical shaft tidal current turbine, and the inflow velocity has a certain influence on the static pressure and the output power of the turbine blade surface. It can provide references for the design and production of the vertical shaft turbine in future.