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为了确定凿岩钻车除尘系统最优参数匹配关系,提高除尘系统效率,对除尘系统关键部件捕尘罩进行研究。利用Inventor建立捕尘罩的三维模型,使用Gambit软件进行网格划分,基于RNG?-?方程的气相湍流模型,借助Fluent软件对原型和改进型捕尘罩内部流场进行了数值模拟分析,采用拉格朗日粒子追踪法描述固相,进行气固两相流运动仿真分析,并与实验观察结果进行对比,验证了仿真的准确性。结果表明:增加导流板和罩体卷边设计,大大提升了流场速度,改进了流场分布,吸尘效率提高了54%。当原型捕尘罩出口流量设为入口流量4倍,明显减少粉尘外泄所造成的二次污染,而改进型仅为3倍,且吸尘效果更好。
In order to determine the optimal parameters matching relationship of the dust removal system of rock drilling rig and improve the efficiency of the dust removal system, the dust cover of the key components of the dust removal system was studied. Using Inventor to build a three-dimensional model of the dust catcher, using Gambit software to mesh, gas-phase turbulence model based on RNG? -? Equations, numerical simulation analysis of the flow field inside the prototype and improved dust cover by Fluent software, The Lagrangian particle tracking method is used to describe the solid phase, and the simulation of gas-solid two-phase flow is carried out. Compared with the experimental observations, the simulation accuracy is verified. The results show that increasing the design of the baffle and cover curling greatly improves the velocity of the flow field and improves the flow field distribution, and the dust collection efficiency is improved by 54%. When the outlet of the prototype dust catcher is set at 4 times of the inlet flow rate, the secondary pollution caused by the dust leakage can be obviously reduced, while the improved type is only 3 times and the vacuuming effect is better.