基于CFD的波浪能转换装置水动力性能分析

Analysis of hydrodynamic performance of wave energy converter based on CFD

为了研究点吸式波浪能转换装置的水动力性能和载荷,采用基于黏性流体力学的CFD方法,模拟三维数值波浪水池,计算了波浪能转换装置的浮子在波浪周期为1.6,2.0,2.4s的运动位移和速度,以及浮子在特定波浪参数下的垂向受力,并与实验值进行对比.结果显示计算值与实验值符合良好,验证了此方法的准确性与可行性.在此基础上,进一步计算并分析了不同机械阻尼对装置运动性能的影响,结果表明机械阻尼增大会导致浮子的运动位移和速度减小,为装置的性能优化提供了依据.

Aimed at studying the hydrodynamic performance and load of the point absorber,a(computational fluid dynamics)CFD method based on viscosity hydrodynamics was used.A three dimensional numerical wave tank was built.The CFD software was used to calculate the displacement and velocity of the point absorber in the wave periods were 1.6,2.0,2.4s,and the heave force in the specific wave condition.They agreed with the experiment results.It was shown that the CFD method had enough accuracy and feasibility.In addition,the influences of damping to the point absorber were also analyzed to provide theory basis for performance optimization of wave energy converter.The result shows that the increasing of damping will cause the displacement and velocity of the buoy decrease.