【摘要】 采用Fluent软件数值模拟分析方法对新型分级轮对撞式气流磨粉碎区喷管出口直径、收缩角以及喷管间距等结构参数进行了优化设计。结果表明：在喷管出口直径3.5～3.9 mm、收缩角26°、喷管间距128～144 mm的参数区间内，气流磨粉碎区流速均匀且有较长的轴向超音速段长度，可达到较好的颗粒粉碎性能；采用Design-Expert软件进行优化组合，得出结构参数的敏感性次序为喷管间距>喷管收缩角>喷管出口直径，最佳结构参数组合为喷管出口直径3.7 mm、收缩角23°、喷管间距136 mm,优化组合的结构参数使新型分级轮对撞式气流磨超音速段长度最大、粉碎区流速更均匀。研究结果可为气流磨粉碎区结构设计参考。更多还原

【Abstract】 The numerical simulation analysis method of Fluent software has been used to optimize the nozzle outlet diameter, contraction angle and nozzle spacing in the crushing zone of new classification wheel collision airflow mill. The results show that within the parameter range of nozzle outlet diameter of 3.5-3.9 mm, contraction angle of 26° and nozzle spacing of 128-144 mm, the flow velocity in the crushing zone is uniform and has long axial supersonic section length, which can achieve better particle crushing performance of collision airflow mill. Using Design-Expert software for optimization combination, the sensitivity order of structural parameters is obtained as nozzle spacing> nozzle contraction angle> nozzle outlet diameter. The optimal combination of structural parameters is nozzle outlet diameter of 3.7 mm, contraction angle of 23° and nozzle spacing of 136 mm. The optimized combination of structural parameters results in the maximum length of the supersonic section and more uniform flow velocity in the crushing zone. The research results can serve as a reference for the design of the structure of the airflow crushing zone.更多还原