Influence Of The Engine Room And Column Structure Of Horizontalaxis Tidal Current Energy Generator Device On Its Hydrodynamic Performance

With the constant consumption of fossil fuels, energy shortage has become a serious problem that needs to be faced in the world today.In recent years,tidal current energy,as a kind of renewable and green energy,gradually becomes the focus of development and utilization.Horizontal axis tidal current energy generator converts tidal current energy into kinetic energy,which can be turned into eclectic power finally.Due to its advantages of good performance in launching and high conversion efficiency,Horizontal axis tidal current energy generator was widely used in the utilization of tidal current energy.Tidal current power generation is still in its infancy and researching was not yet mature.This paper focused on the supporting mechanism of device firstly and then studied on the influence of the support mechanism on the hydrodynamic performance of hydraulic turbine by changing the diameter and shape of the engine room, as well as the diameter and distance from the impeller of the support column.This paper firstly expounded the research background and significance of the horizontal axis tidal current energy generator, and analyzed the current research status of the power generation device at home and abroad.In this paper, the basic theory of hydraulic turbine was introduced, and the characteristic parameters of the airfoil were analyzed by using the software of the airfoil.According to the blade parameters,Three dimensional full scale modeling of horizontal axis tidal current energy generator device was made.By using the LBM method, established the numerical analysis model of the horizontal axis tidal current energy generator, and analyzed the hydrodynamic performance of the turbine under different tip speed ratio.Compared with the the results of experiment, the LBM method are verified by model test.Based on the certain velocity and direction of the flow and the rotational speed of the impeller,studied the hydrodynamic performance of a supporting mechanism with different parameters and different structures by using LBM method.And then, the influence law of the capture efficiency and the axial thrust coefficient of the turbine was obtained.In this article,the influence law of the supporting mechanism on the horizontal axis tidal current energy generator was revealed initially,which provides the reference basis for the optimal design and engineering application of the hydraulic turbine,and lays the foundation for further research on the development and utilization of tidal current energy.