Experimental And Simulation Study Of Erosion Wear Of Fan Blades In Microgrid

The development of new energy is the trend of the world's sustainable development.The new energy microgrid is a new technology field that solves some problems of energy shortage and environmental pollution.Wind power is an important part of the new energy microgrid and a core force in the development of the new energy revolution.As one of the most important original components of the fan generator,erosion wear of the blade caused by erosion of solid or liquid substances such as gravel and raindrops will affect the normal operation of the entire fan.Aiming at the problem of erosion and wear of wind turbine blades,this paper uses the combination of theoretical analysis,test and numerical simulation to test and simulate the erosion and wear of wind turbine blades.This article mainly carried out the following work:(1)The particle erosion wear test bench was designed and built.The erosion resistance test was carried out on the sample materials by changing the impact speed,particle size and impact angle.Based on the experimental results,the correlation function in the simulation mathematical model is calculated and the parameters are corrected into the simulation mathematical model.(2)Using FLUENT software to simulate the blade sample level numerically,the influence of three factors on the erosion process of the fan blade is obtained.Based on the comparative analysis of experimental and numerical calculation data,the results obtained by the erosion test are verified,and the correlation function in the simulation mathematical model is reliable and reasonable.It provides a new research method for the simulation study of blade erosion wear.(3)From the perspective of the wear position of the blade,the numerical simulation of the flow-solid coupling flow around the three-dimensional full-size of the single blade leads to the conclusion that as the wind speed increases,the blade wears gradually through the blade root to the blade ridge.When the living area is transferred,and the leading edge of the blade,especially the tip of the blade,is subjected to the most serious wear;when under different particle size conditions,the windward surface of the blade is almost completely eroded by wind and sand,and even the case of sand holes may occur.The overall erosion rate is not much different under different particle sizes,and the change trend is relatively mild.Therefore,the solid particle size is not the key factor for blade erosion wear;as the particle impact angle becomes larger,the blade positions are affected.Wind,sand erosion and wear will become more serious.