轴流导叶式脱气器流场分析及性能研究  

Flow Field Analysis and Performance Study of an Axial Flow Vane-Type Degasser

作　　者：张博文[1] 代玉强[1] 朱景平 ZHANG Bo-wen;DAI Yu-qing;ZHU Jing-ping(School of Chemical Machinery,Dalian University of Technology,Dalian,China,116024)

机构地区：[1]大连理工大学化工机械与安全学院,辽宁大连116024

出　　处：《热能动力工程》2020年第11期100-105,共6页Journal of Engineering for Thermal Energy and Power

摘　　要：通过数值模拟对特定结构脱气器内工质的流动状态进行分析,并利用摄像机对脱气器内气相的形态变化进行捕捉。结果表明:脱气器内的流场呈兰金涡的形态;排气方式和出口压力对气柱能否形成及液体夹带率有影响,对于顺流排气与混流排气的工况,当出口压力达到临界分离压力时,脱气效率可达95%;液体夹带率随处理量的提高呈下降趋势;逆流排气的夹带率最低,混流排气夹带率最高;在处理量分别为1.5、2.25和3 m^3/h,且出口压力不超过40 kPa的情况下,液体夹带率均不超过10%。This paper uses numerical simulation to show the flow field state of the working fluid in the degasser with a specific structure,and uses a camera to capture the morphological changes of the gas phase in the degasser.The research shows that the flow field in the degasser is in the form of a Rankine Vortex.The exhaust mode and outlet pressure have an important influence on the formation of the gas core and the liquid entrainment rate.For the conditions of downstream and mixed-flow exhausts,when the outlet pressure reaches the critical separation pressure,the degassing efficiency can reach 95%,and the liquid entrainment rate decreases with the increase of the processing capacity.Among them,the entrainment rate of the upstream exhaust is the lowest,and the entrainment rate of the mixed flow exhaust is the highest.When the treatment capacity is 1.5,2.25,3 m^3/h,and the outlet pressure does not exceed 40 kPa,the liquid entrainment rate of the three treatment volumes does not exceed 10%.

关 键 词：两相流 脱气器 数值模拟 可视化 

分 类 号：TQO51.8[化学工程]