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.
出处
《当代化工》
CAS
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
关键词
喷射器
二维速度场
亚极限
喷射系数
验证
ejector
2-D velocity field
sub-critical
entrainment ratio
validation
