基于CFD-DEM耦合法的莲子壳仁分离装置优化与试验分析

摘要

借助 FLUENT软件对莲子物料分离通道气流场分布规律进行仿真分析。采用 CFD-DEM耦合法对混合物料在分离通道中的分离过程进行数值模拟。以分离气流速度、入料管倾斜角、分离通道倾斜角为因素开展了仿真试验,分析了各因素对清选率的影响,确定了分离通道的优化工艺参数为：入料管倾斜角60°、分离通道倾斜角35°、分离气流速度7.881 m/s,与实体样机试验结果一致。试验结果表明 CFD-DEM耦合仿真方法可用于莲子物料分离的研究,所获工艺参数为莲子混合物料分离机的设计提供了参考依据。%The simulation of separation channel airflow field distribu-tion was implemented with FLUENT software.The CFD-DEM cou-pling method was used to simulate the separation progress of the mixtures in the separation channel.For fluid outlet velocity,inclina-tion angel of inlet tube and inclination angle of separating channel factors was carried out by simulation experiment,determine the opti-mal technological parameter of separating channel as follows:inclina-tion angel of inlet tube was 60°,inclination angle of separating chan-nel was 35°,fluid outlet velocity was 7.881 m/s,and the results were the same with the physical prototype.The feasibility to use CFD-DEM coupling method to study the separation device for lotus seed and its contaminates was verified.The result of this study can be taken reference for the research on separating equipment for lotus seed kernel and shell.