Design And Performance Of Triboelectric Nanogenerator Based On Gallop

With the close combination of the Internet of Things and the Internet,sensors are widely used.Traditional energy supply methods cannot meet the needs of the wide use of sensors.Collecting wind energy for sensor power supply is the key method to solve this problem.Therefore,it is of great practical significance to study a small wind energy collector to convert wind energy into electric energy for sensor power supply.The wind energy collector based on triboelectric Nanogenerator(TENG)is widely used because of its simple structure,low cost and high output.In order to improve the efficiency of wind energy collection and reduce the cost,a multi degree of freedom triboelectric Nanogenerator(MDF-TENG)based on galloping is designed in this paper.The whole structure adopts vertical structure to avoid the interference of the flow field behind the bluff body and improve the friction contact area of MDF-TENG.The main beam and the auxiliary beams on both sides alternately contact and beat,which can obtain higher surface charge density and higher output power.At the same time,the main beam and the auxiliary beams on both sides form two TENG with staggered working time,which significantly improves the energy collection efficiency of mdf-teng.It has the advantages of simple processing and economic benefits.According to the structure of MDF-TENG,the electromechanical coupling dynamic model is established.In order to improve the aerodynamic performance of mdf-teng,different numbers and positions of baffles are set on MDF-TENG to optimize the structure.There are four groups of MDF-TENG,which are upper baffle plus front baffle MDF-TENG,front baffle MDF-TENG,upper baffle MDF-TENG and non baffle MDF-TENG.The fluent flow field simulation shows that the MDF-TENG with the upper baffle and the front baffle has the best aerodynamic performance,greater collision force between the main beam and the auxiliary beam,larger effective friction contact area,higher output power and voltage.The prototype of 3D printer is used for experiment.Firstly,the influence of load resistance on the output performance of MDF-TENG is analyzed,and the optimal load resistance is obtained.Then,the output performance of four groups of MDF-TENG in the range of 3 m/s to 10 m/s is compared and analyzed under the optimal load resistance,and the conclusion that the output performance of MDF-TENG with upper baffle and front baffle is the best is obtained,Finally,numerical simulation is used to verify the correctness of the electromechanical coupling dynamic model.In the experimental process,it is found that the relative size parameters of upperbaffle and front baffle MDF-Teng have a great influence on the output performance.The influences of the thickness of the plate surface of the auxiliary beam,the friction contact area,the thickness of the auxiliary beam rod and the size of the resistance fluid on the output performance are studied by numerical simulation and experiment.When the characteristic size of the resistance fluid is 90 mm,the height is120 mm,the friction contact area of the auxiliary beam is 60×60 mm~2,the thickness of the friction contact surface is 2 mm,the thickness of the rod is 0.8 mm,the main beam and the auxiliary beam on both sides are installed 40 mm apart from the fixed end,the output performance is the best,the maximum average output power is 268μW,the output voltage is 420 V.