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应用固体颗粒在液体介质中的沉降理论及ANSYS Fluent的离散相模型(DPM),开展了过载条件下固体颗粒在长距离液氧输送管内的流速特性分析,数值研究了不同颗粒直径、不同过载条件的颗粒加速特性,得到了以下结论:在过载条件下,固体颗粒在长距离液氧输送管内的流体阻力主要是压差阻力,该压差阻力使得颗粒在输送管内的加速特性并不明显。计算表明:对于5mm直径的固体颗粒,在5g过载条件下,颗粒相对液氧的沉降末速略高于1m/s。
Based on the theory of sedimentation of solid particles in liquid medium and discrete phase model (DPM) of ANSYS Fluent, the flow characteristics of solid particles in long-distance liquid oxygen transport tube under overload condition were investigated. The effects of different particle diameters, different overload conditions The results show that under the overload condition, the fluid resistance of solid particles in the long-distance liquid oxygen delivery pipe is mainly the pressure resistance, which makes the acceleration characteristics of the particles in the delivery pipe not obvious. Calculations show that for 5 mm diameter solid particles, the settling velocity of particles relative to liquid oxygen is slightly higher than 1 m / s under 5 g overload conditions.