| Solid particle erosion wear refers to the abrasive size in a certain range ofdifferent angles and at a certain speed impact to equipment or parts surface, causing aphenomenon of significantly reducing the service life. In the engineering field,particularly in the aerospace, oil transportation pipelines, farmland irrigation andmany important energy and chemical sectors, erosion wear has become an importantreason for a lot of material damage or equipment failure in industrial production,reducing the using life of materials and equipment, and also caused a large economicloss.Comprehensive global good environment of wind power development andprospect of wind power development in our country, this topic mainly considering thecondition of specific natural wind field in Xinjiang region, such as desert saline soil,the weak alkaline water corrosion resistance of steel material, the characteristics of themutt-sand, the main research focus on wind turbine tower under the environment oftwo phase flow in the sand erosion wear. Through testing the three comprehensiveinfluence factors of the impact velocity, impact Angle and particle diameter. Studyingthe results of erosion wear, obtaining the erosion wear rule of material, combiningwith the materials’ grinding crack morphology photos, the material failure mechanismwas revealed. On this basis, using DPM numerical simulation, and verifying thesimulation results with experimental results. The research results we obtained listed asfollowings:(1) The erosion wear test results show that:a): The most important factor of weight loss is the impact of the erosion rate,followed by the particle size, the least is the angle of impact.b): When the abrasive particle size was0.109-0.212mm along with impact angleof45°, as the wind speed increases, the weight loss of the material showing an overalltrend of rapid increase. When the impact velocity was7.9m/s, the specimen weight loss was only0.0239g/kg, when the impact velocity was17.4m/s, the weight loss ratereached to0.3524g/kg, nearly double the rate of increase, but the increase rate ofweight loss showed nearly14times.c): When the impact speed was12.8m/s along with impact velocity of45°, theweight loss of the sample surface erosion rate obeyed the following regular: increasedwith the size of abrasive particle showed a significantly reduced after a first increase.When the particle size changes from0.075-0.150mm to0.109-0.212mm, the weightloss changes from0.1214g/kg to0.1532g/kg, but when the particle size increasedfrom0.109-0.212mm to0.380-0.830mm, as the particle size increases, the weight lossrate showed a significant decreasing trend, from0.1532g/kg reduced to0.0514g/kg.d): When the abrasive diameter was0.109-0.212mm along with the impact speedof12.8m/s, the weight loss rate of erosion surface of the sample increases with theimpact angle variation after the presentation of the first increases and then decreases.When the impact angle was15°, the weight loss was the smallest, only0.0438g/kg;when the impact angle increased to30°, the weight loss was significantly increased,reaching0.1469g/kg; when the impact angle was45°, while the weight loss rate wascontinuing to increase and reaching a maximum value of0.1532g/kg, but the rate ofincrease has been relatively very slow; when the impact angle was60°,the weight lossrate was reduced to0.1468g/kg, compared to the weight loss of30°which was almostno change; and finally the impact angle increased to90°, the weight loss was0.1149g/kg, reducing showed unobviously.e): The hardness of the coating was only3-10%of that of substrate hardness;under the same kind of erosion environment, the film in the surface exhibits a poorerosion resistance.(2)The DPM simulation results are showed as following:a): As the wind speed increases, the speed of arrival particles also increases,resulting in increased erosion rate. b): With the increasing of particle size, the particle velocity reaches to sampleswas decreasing, resulting in erosion rate was also getting smaller and smaller. |
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