| With the drastic consumption of traditional energy,the contradiction among population,environment and energy is becoming more and more prominent.In this situation,How to coordinate the relationship between the three is a key issue that all countries must face and solve for their development,wave energy can stand out in the green energy with its wide distribution,large energy density,non-polluting,renewable and many other advantages.The oscillating buoy wave power generation device is recognized as the most promising wave energy conversion method in many wave energy generating units.In this paper,the physical model test and numerical simulation are used to study the performance of the oscillating buoy wave energy capture device based on its engineering application background.Aiming at the key factors that affect the working performance of wave power generation device,the following work is mainly carried out:First,a combination of a round-shaped float and a cylinder is used as a physical model test for a wave energy capture system.In the regular wave environment,the effects of incident wave height,period and initial draft depth on the horizontal wave force of the energy harvesting system,the vertical acceleration of the buoy and the energy absorption efficiency of the energy harvesting system are emphatically investigated.It is found that the relationship between the horizontal wave positive force,vertical acceleration,primary energy capture efficiency and the initial draft of the floater,the wave element.The best trapping cycle is given under the test condition.Secondly,in order to balance the numerical time-consuming and computational accuracy,a two-dimensional numerical flume is established by using Gambit pre-processing software.The number of grids in the length of the flume and the height of the wave height is determined preliminarily through numerical convergence testing with waves2 Foam from the Waveform Toolkit for OpenFOAM,it provide a grid plan reference for the establishment of the threedimensional numerical value flume.Once again,based on the completion of the above work,the vertical motion response of the float is further analyzed by numerical simulation.A three-dimensional numerical flume is established and verifies its wave making effect.Then,cylindrical float and truncated cone float were compared under the same incident wave environment to further verify the vertical motion response of the float model selection.And then a combination model of a circular floater and a fixed cylinder are added,And then import into OpenFOAM for calculation.Comparing the system wave force calculated by the numerical calculation under the same conditions with the model test results,This proves the reliability of numerical calculation.Then the influence of the incident wave elements and the initial draft depth of the buoy on the vertical motion response of the float is analyzed respectively.In order to find the better wave response and the immersion depth of the float,through the vertical motion response.Finally,in order to study the working performance of the array oscillating-type floating power generation device and the influence of each float's motion response on each other,three equal-scale circular table-shaped buoys are arranged in a circle and are numerically simulated in a three-dimensional numerical water tank.The hydrodynamic performance of the array type float power plant and the motion response of each float are analyzed.In a word,in this paper the physical model test and the numerical simulation are adopted to study the main factors that affect the efficiency of capture of floating oscillators(such as the incident wave height,period,initial draft of the float,etc.).It provides a reference for the development of certain areas in practical engineering wave energy conversion device.The results show that the vertical motion response between the floats in the array float system has little influence,and the float system has a high efficiency of energy conversion. |
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