对气相射流垂直冲击液面过程中射流深度的研究  

Research on Penetration Depth of Vertical Impinging Gas Jet on Liquid Surface

作　　者：王晶晶 唐希武 刘艳升 曹睿 刘拥军 WANG Jing-jing;TANG Xi-wu;LIU Yan-sheng;CAO Rui;LIU Yong-jun(Petrochemical Research Institute,CNPC,Beijing 102206,China;China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油石油化工研究院,北京昌平102206 [2]中国石油大学(北京)化学工程学院,北京昌平102249

出　　处：《当代化工》2018年第9期1844-1848,1852,共6页Contemporary Chemical Industry

摘　　要：以空气-水、空气-甘油水溶液两类体系,对气液两相中气体垂直向下喷射的射流深度进行了冷模实验研究。应用计算流体力学的VOF模型和realistic k-ε湍流模型进行模拟计算,模拟结果与实验数据有良好的一致性。结合实验和模拟进行计算分析,结果显示:主导射流深度的主要因素为Fr数和气液密度比;大喷孔和短喷距的组合可得到较大射流深度;表面张力的影响主要存在于浅气穴阶段,当气相射流射穿液面时,其影响骤然消减;液相粘度对射流深度基本无影响。通过数值模拟合理地进行了体系物性扩展,分析结论对于以气相射流为主的两相混合传质传热或反应的工艺设计,具有一定的指导作用。Taking two systems of air-water and air-glycerine aqueous solution as the research object, a cold-mode experimental research on the penetration depth of downward vertical gas jet on liquid surface was conducted. It＇s found that VOF and realistic k-ε models can give well simulation results for such types of experiments. The analysis of experiment and numerical simulation showed that： Fr number and gas-liquid density ratio were the main factors affecting penetration depth; the combination of large nozzle and short jetting distance could get deeper penetration depth; the influence of surface tension mainly existed in the shallow cavity, and it suddenly reduced when liquid surface was penetrated; the liquid viscosity had few effect on the penetration depth. With numerical simulation, gas-liquid phase＇s physical property scope was reasonably expanded. The conclusion from this work can provide a certain guidance for the process design of jet flow of gas-liquid two-phase mixture about the heat and mass transfer or the reaction.

关 键 词：射流深度 气相射流 垂直喷射 物性扩展 数值模拟 

分 类 号：TQ021.4[化学工程]