数值模拟射砂过程不同曳力模型应用对比  

Application Comparison of Different Drag Models in Numerical Simulation of Core Shooting Process

作　　者：郭小琦 李伟峰 廖敦明[1] 陈宇豪 杨铭 GUO Xiao-qi;LI Wei-feng;LIAO Dun-ming;CHEN Yu-hao;YANG Ming(State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Zhejiang Hongma Casting Co.,Ltd.,Pinghu 314200,Zhejiang,China)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074 [2]浙江红马铸造有限公司,浙江平湖314200

出　　处：《铸造》2020年第11期1221-1227,共7页Foundry

基　　金：广东省重点领域研发计划.项目(2019B090921001);华合方实验室基金(由陕西方直贸易有限公司资助)。

摘　　要：基于计算颗粒流体力学(CPFD)商业化软件Barracuda,分别使用EMMS模型、Ergun模型和WenYu-Ergun曳力模型模拟了射砂过程。将模拟结果和高速摄像机拍摄的砂粒流态进行对比,EMMS曳力模型的预测结果更为准确。直观分析了颗粒体积分数对三种模型曳力值的影响。同时对三种不同模型预测的颗粒速度、颗粒体积分数、曳力值、滑移速度进行了对比研究。结果表明,EMMS曳力模型由于考虑了颗粒团聚效应的影响,能够更加准确地模拟射砂过程。Based on the commercialized software Barracuda of Computational Particle Hydro dynamics(CPFD),the core shooting process was simulated by using the EMMS model,the Ergun model and the Wen Yu-Ergun drag model,respectively.Comparing the sand flow behavior simulated by the three models with the sand flow behavior captured by high-speed cameras,it was found that the prediction results of the EMMS drag model are more accurate.The effect of particle volume fraction on the drag force values of the three models is visually analyzed.The particle velocity,particle volume fraction,drag force value,and slip velocity predicted by the three different drag models are compared.The results show that the EMMS drag model can more accurately simulate the core shooting process due to taking into account the effect of particle agglomeration.

关 键 词：曳力模型 射砂工艺 数值模拟 气固两相流 

分 类 号：TG242.7[金属学及工艺—铸造]