纵向涡发生器排数对三维喷动床内气-固两相流动影响数值模拟  

Effect of Row Number in Longitudinal Vortex Generator on Gas-Solid Two Phase Flow in Three Dimensional Spouted Bed

作　　者：张洁洁[1] 尚灵祎 吴峰[1] 马晓迅[1,2] 杨剑 ZHANG Jiejie;SHANG Lingyi;WU Feng;MA Xiaoxun;YANG Jian(School of Chemical Engineering,Northwest University,Xi’an 710069,China;Shaanxi Research Center of Engineering Technology for Clean Coal Conversion,Xi’an 710069,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西北大学化工学院,陕西西安710069 [2]陕西省洁净煤转化工程技术中心,陕西西安710069 [3]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《石油学报（石油加工）》2018年第5期975-980,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(21476181);中国博士后科学基金第8批特别资助项目(2015T81048);第54批中国博士后面上一等基金项目(2013M540768)资助

摘　　要：为了研究纵向涡流对柱锥体喷动床内颗粒横向混合规律的影响,采用双流体模型对带纵向涡发生器喷动床内的气-固两相流动规律进行了数值模拟,分析了纵向涡流效应及纵向涡发生器排数(1~3排)对喷动床内颗粒相运动规律的影响。结果表明,纵向涡流能够有效地增加喷动床内近环隙区域颗粒的体积分数,使得颗粒沿径向分布更加均匀。其中2排纵向涡发生器能够使喷动床内整体颗粒体积分数沿径向分布实现最均匀状态。纵向涡流能够有效增加喷动床内颗粒的径向速度,强化气体、颗粒的横向混合,进而有效地降低了颗粒拟温度。The gas-solid mixing behaviors of a three dimensional cylindrical spouted bed with longitudinal vortex generators were studied using two-fluid model.The row number effects(one^three rows)in longitudinal vortex generator on spouted bed hydrodynamics were studied through numerical simulation.The simulation results suggest that longitudinal vortices can effectively increase particle volume fraction near the annulus region in the spouted bed,and enable particle distribute more uniformly in the spouted bed along the radial direction.Especially,two rows of longitudinal vortex generators enable particle volume fraction more uniformly distributes along the radial direction compared with that of one or three rows.Longitudinal vortex can also enhance the radial velocity of particles in the spouted bed,strengthen the radial mixing of gas phase and particles,and thus effectively reduce the granular temperature.

关 键 词：柱锥体喷动床 纵向涡发生器排数 气-固两相流动 数值模拟 

分 类 号：TQ021.3[化学工程]