一种基于二维速度场的R141b喷射器新模型  

A Novel R141b Ejector Model Based on 2-D Velocity Field

作　　者：陈汉[1] 卢苇[1] 刘纪云[1] 许浩[1] 徐昆[1] 刘进阳 

机构地区：[1]广西大学化学化工学院广西石化资源加工及过程强化技术重点实验室,广西南宁530004

出　　处：《当代化工》2016年第8期1974-1977,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金项目;项目号:51366001;广西自然科学基金项目;项目号2013GXNSFAA019292

摘　　要：根据喷射器内部速度场分布改进了混合过程的数学模型,建立了一种基于二维速度场的极限—亚极限喷射器模型。计算了R141b工质的临界背压值及极限—亚极限状态下的喷射系数。与实验数据对比表明:理论极限喷射系数和临界背压值的平均误差分别为4.63%和3.8%;亚极限状态下的理论喷射系数比常规一维模型更加契合实验值。此模型可较好的预测R141b喷射器极限—亚极限状态的性能。The mixing process model was improved according to the velocity field distribution inside ejector, and the critical/sub-critical ejector model based on 2-D velocity field was established. The critical back pressures and entrainment ratios in critical/sub-critical condition were calculated using R141 b as working fluid. Calculated results were compared with experimental data. The results show that the average errors of theoretical critical entrainment ratios and critical back pressures are 4.63% and 3.8%, respectively. The theoretical sub-critical entrainment ratios based on proposed 2-D velocity field are closer to the experimental data than those based on conventional 1-D model. The novel model can better predict the R141 b ejector performance in critical/ sub-critical regions.

关 键 词：喷射器 二维速度场 亚极限 喷射系数 验证 

分 类 号：TQ051[化学工程] TH48[机械工程—机械制造及自动化]