基于微米沙尘高温弹塑性碰撞理论及沙尘-壁面碰撞沉积模型和两相流理论，研究了不同温度下1~5 μm沙尘与镍基单晶材料壁面碰撞沉积特性，分析了气流流动特性、颗粒运动轨迹和碰撞沉积结果等，研究了粒径和温度对微米沙尘碰撞率、沉积率和捕捉率的影响。结果表明：微米沙尘在通道输送过程中不同出口位置处运动轨迹差异较大；温度为1 323 K时，直径1~5 μm沙尘碰撞率随粒径减小而减小，1 μm沙尘沉积率和捕捉率最大，分别为37.86%和6.049%，2 μm以上沙尘沉积率和捕捉率相对较小；直径1 μm沙尘在1 273，1 323和1 343 K 3种温度下沉积率和捕捉率随温度升高而增大。

Based on the high temperature elasticplastic collision theory of micronsized sand dust,the sand dustwall collision deposition model and the twophase flow theory,the collision and deposition characteristics at different temperatures were studied for the sand dust of 1 to 5 μm and the nickelbased single crystal wall surface,the air flow characteristics,particle motion trajectories and collision deposition results were analyzed,and the influence of particle size and temperature on the collision rate,deposition rate and capture rate of micronsized sand dust was studied.The results show that the motion trajectories of micronsized sand dust at different outlet positions are quite different in the channel transportation process.The collision rate of sand dust with the diameters of 1 to 5 μm decreases with the decrease of particle size when the temperature is 1 323 K.The deposition rate and capture rate are highest for the sand dust of 1 μm,which are 37.86% and 6.049% respectively.The deposition rate and capture rate are much lower for sand dust with the diameter above 2 μm.The deposition rate and capture rate for the sand dust with the diameter of 1 μm increase with the rise of the temperature at 1 273 K,1 323 K and 1 343 K.

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国家自然科学基金（51975187）；国防基础科研项目（JCKY2018419C002）；国家科技重大专项（2017-Ⅳ-0003-0040)；河南省科技攻关项目（202102210309）；河南省高等学校重点科研项目（19A130002）