夹套射流下射流撞击-负压反应器内不对称性流场模拟  

Simulation Analysis of Asymmetric Flow Field in a Jet Impingement-negative Pressure Reactor Under Jacketed Jet

作　　者：印驰 彭耀华 闫红英 邱发成 YIN Chi;PENG Yaohua;YAN Hongying;QIU Facheng(College of Chemistry and Chemical Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学化学化工学院,重庆400054

出　　处：《山东化工》2025年第3期40-43,47,共5页Shandong Chemical Industry

基　　金：重庆市教育委员会科学技术研究计划青年项目资助项目(KJQN202401157)。

摘　　要：射流撞击-负压反应器是一种高效连续脱氨装置。然而,由于单入口夹套射流结构的存在,使得进入负压分离区的射流易出现不对称性流场。其次,负压条件下撞击过程是一个非稳态过程,内部流场十分紊乱,难以通过实验的方式去定量分析。基于此,本研究采用计算流体动力学(CFD)模拟,探究了射流撞击-负压反应器内部的不对称流场。通过Realizable k-ε湍流模型,分析了流线、压力、速度和湍动能的分布。研究发现,由于夹套结构的影响,液相进口处出现回流,加剧了能量耗散,导致射流速度不对称,进而使撞击中心偏离反应器中心。该研究为反应器的结构优化提供理论依据。The jet impingement-negative pressure reactor is an efficient continuous ammonia removal device.However,the presence of a single-entry jacketed jet structure can lead to asymmetric flow fields in the jet entering the vacuum separation area.Additionally,the impingement process under vacuum conditions is unsteady,with a highly turbulent internal flow field that is challenging to quantitatively analyze experimentally.Therefore,in this study,computational fluid dynamics(CFD)simulation was employed to investigate the asymmetric flow field within the jet impingement-negative pressure reactor.The Realizable k-ε turbulence model was utilized to analyze the distribution of streamlines,pressure,velocity and turbulent kinetic energy.The results revealed that the jacket structure caused a recirculation at the liquid phase inlet,intensifying energy dissipation and resulting in asymmetric jet velocities,which ultimately led to a shift of the impingement center away from the reactor's geometric center.These findings can provide a theoretical basis for the structural optimization of the reactor.

关 键 词：射流撞击-负压反应器 夹套射流 不对称流场 计算流体动力学 CFD 

分 类 号：TQ018[化学工程]