基于介电弹性体的振荡水柱波浪能发电模拟分析

振荡水柱式(OWC)波浪能采集装置结构简单、成本低;介电弹性体作为发电机可以收集人体能、海洋能、风能等,能量密度高、耐冲击、环境适应性强,利用OWC驱动介电弹性体形变发电应用前景好。在FLUENT中建立二维数值水槽OWC模型分析气室内波高和压强的变化规律;在Abaqus有限元分析系统中将波浪进入气室的模拟压强施加到介电弹性体薄膜模型产生形变,采用Simulink计算介电弹性体发电量。结果表明:介电弹性体发电量随着薄膜面积、气室压强增加而增大;随着薄膜厚度、预拉伸强度增大而减小,并且这两者对发电量影响较大。

Simulation analysis of wave power generation of oscillating water column based on dielectric elastomer

The oscillating water column (OWC) wave energy acquisition device has the advantages of simple structure and low cost.And dielectric elastomer (DE) membranes have the capabilities both as actuators and generators.For generator applications, it demonstrate great potential for harvesting energy from human kinetic, ocean wave, wind and hydro power harvester, and so on.The dielectric elastomer generator boasts high energy density, strong impact resistance and excellent environmental adaptability.The deformation of DE generator prompted by OWC enjoys a good prospect.The two-dimensional numerical water flume OWC model was established with FLUENT to analyze the variation of wave height and pressure in gas chamber.In the ABAQUS finite element analysis system, the DE membrane deformed with the pressure from gas chamber.The theoretical calculation of generating capacity of dielectric elastomer was finished with the Simulink software.And the results show that the electric power rises with the increase of membrane area and gas chamber pressure.On the other hand, it decreases with the increase of membrane thickness and pretension strength and both of them influence the generation capacity significantly.The analysis process provides theoretical and technical support for dielectric elastomer power generation driven by wave energy.