挟沙风冲蚀风力机叶片涂层磨损研究  

STUDY ON COATINGS EROSION OF WIND TURBINE BLADES UNDER SAND-CARRYING WIND

作　　者：高津 张永[1] 王健 苏力德 吴国境 琦格琦 Gao Jin;Zhang Yong;Wang Jian;Su Lide;Wu Guojing;Qi Geqi(School of Mechanical and Electrical Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China)

机构地区：[1]内蒙古农业大学机电工程学院,呼和浩特010018

出　　处：《太阳能学报》2020年第7期367-371,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(11262015);内蒙古自治区自然科学基金(2018MS0502;2018BS06003);内蒙古草原英才“现代农牧业工程新技术研发及应用创新人才团队”(内组通字[2018]19号)。

摘　　要：为了揭示风力机叶片涂层在风沙环境中的冲蚀机理,采用数值模拟和理论计算的方法,对挟沙风冲蚀风力机叶片涂层磨损情况进行研究。在来流速度相同时,通过改变沙粒粒径大小,对挟沙风冲蚀叶片涂层过程中沙粒的运动轨迹、沙粒行为以及涂层受到撞击部位受力情况进行分析,结果表明:粒径较大的沙粒大多是对叶片涂层表面直接撞击,而粒径较小的沙粒,大多是对叶片涂层表面进行斜擦;迎风面涂层主要受到沙粒的切向切削和挤压作用;前缘涂层只受到沙粒的法向冲击和挤压作用;叶尖同时受到沙粒的切向切削和法向冲击作用。In order to reveal the erosion mechanism of wind turbine blades coatings in sandy environment,the numerical simulation and theoretical calculation were used to studied coatings erosion of wind turbine blades.Under the same inflow velocity,by changing the particle size of sand grains,the trajectory and behavior of sand grains in the process of wind turbine blades coatings erosion by sand-carrying wind were analyzed.At the same time,the force acting on the impinging part of the coatings were also analyzed.The results showed that under the same inflow velocity,the sand grains with larger particle size mostly directly impinged on the coatings of wind turbine blades,while those with smaller particle size mainly rubbed diagonally on the coatings.The coatings on the windward surface of wind turbine blades were mainly subjected to the tangential cutting and extrusion of the sand grains,while the coatings on the leading edge were only subjected to the normal impact and extrusion of the sand grains,the coatings on the tip were subjected to both tangential cutting and normal impact of sand grains.It provides a theoretical basis for the study of partition adaptive coatings for wind turbine blades.

关 键 词：风力机 叶片涂层 冲蚀磨损 数值模拟 接触力学 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]