Simulation And Experimental Research On DE Generator Induced By OWC

Device of OWC induced DE to generate electricity is a new type of wave energy generation device with simple structure,high efficiency and low cost,which can provide long-lasting power for many wireless sensor networks in the sea.The power generation device consists of two parts:the wave energy collecting device and the DE power generation device.The OWC gas chamber of the wave energy collecting device converts the wave energy into the high-speed flow of air,and the DE power generation device converts the mechanical energy collected by the gas chamber into electric energy.The DE and air chamber are directly coupled through air,eliminating the intermediate energy conversion mechanism,reducing the cost and improving the energy conversion efficiency.A two-dimensional numerical wave flume was established to simulate and analyze the gas chamber of an OWC by using the method of open channel wave generation and porous media wave absorption.By establishing the oscillating water column chamber model with different structural parameters,we simulated the air chamber under different waves,and obtained the relationship between the pressure and relative wave height in the gas chamber with various parameters.The simulation results show that the variation of gas chamber pressure and relative wave height is consistent,and the incident wave height has the most obvious impact on the air chamber pressure and relative wave height.When other parameters of the air chamber are the same,the higher the incident wave height is,the higher the air chamber pressure and relative wave height are.The immersion depth of the front wall has a certain influence on the pressure and relative wave height in the gas chamber.The immersion depth is 1m,and the gas pressure and relative wave height are slightly larger than the immersion depth of 0.5m.Within a certain range,the influence of the thickness of the front wall of the gas chamber on the pressure and relative wave height in the gas chamber is not obvious.We use the third-order Ogden strain energy density function to establish a simulation model of DE superelastic deformation.The undetermined parameters of the third-order Ogden model were fitted according to the uniaxial tensile test data of the silicon rubber material and carried out deformation simulation of silicon rubber DE with different parameters.With the increase of pressure and radius,the larger deformation of the DE will have.The larger the pre-tension and the smaller deformation of the DE will be.According to the theoretical calculation formula of DE constant voltage power generation operation mode,we carried out simulation analysis of power generation,and obtained the relationship between the power generation of different parameters of DE with pressure,that is,the amount of power generation increases as the pressure increases,and increases as the thickness decreases.In addition,after pre-stretching of the DE,the amount of power generation is reduced.Setting up an experimental platform for OWC induced DE to generate electricity.By measuring the output voltage of dielectric elastomers under different bias voltage and different pressure,it was found that the output voltage increased with the increase of bias voltage and pressure.The experimental results are consistent with the simulation results,which verify the accuracy of the simulation analysis results.Through the combination of simulation analysis and experiment,we studied in OWC induced DE to generate electricity,provided theoretical experience and technical support for the follow-up research of the power generation device,and laid a foundation for the construction of China's"transparent ocean" plan.