基于薄填充床模型的射流折射现象研究  

STUDY ON THE JET REFRACTION PHENOMENON BASED ON THIN-PACKED BED MODEL

作　　者：孙艺恒 李文博 刘士震 尚芃锦 赵鹏程 SUN Yiheng;LI Wenbo;LIU Shizhen;SHANG Pengjin;ZHAO Pengcheng(School of Aeronautics and Astronautics,Shenyang Aerospace University,Shenyang,Liaoning 110136;School of Science,Shenyang Aerospace University,Shenyang,Liaoning 110136)

机构地区：[1]沈阳航空航天大学航空宇航学院 [2]沈阳航空航天大学理学院,辽宁沈阳110136

出　　处：《物理与工程》2024年第5期189-197,共9页Physics and Engineering

基　　金：2022辽宁省教育厅项目(LIKMZ20220522);辽宁省教育厅项目(青年项目)20240201。

摘　　要：本文主要研究了射流冲击斜置网面后因下游射流路径发生改变所产生的射流折射现象。在研究中网面被看成一个薄填充床,利用法向压降、切向阻力求出了两个恢复系数并表示出了折射程度的特征量—偏折角。将实验探究与Fluent仿真分析相结合,通过控制流速、射流直径、网面倾角与目数等参数得到了射流折射现象随这些参数变化的规律。结果表明:筛网倾角和目数对偏折现象的影响最明显,目数较高或网面孔隙率较小时还会发生贴网流动和内偏折现象。This paper mainly investigates the jet refraction phenomenon caused by the change in the downstream jet path after the jet impacts an inclined mesh surface.In this study,the mesh surface is regarded as a thin packed bed,the bend angle-the degree of refraction is described by two restitution coefficients which are calculated using normal pressure drop and tangential resistance.Combining the experiment exploration with Fluent simulation analysis,the law of jet refraction phenomenon changing with parameters such as flow velocity,jet diameter,mesh surface inclination angle,and mesh count are obtained.The results show that the jet refraction phenomenon is influenced most obviously by the angle of inclination and mesh number.The along-screen-flow and internal refraction may occur when the mesh number is high or the screen porosity is small.

关 键 词：射流折射 多孔介质 薄填充床 穿网压降 速度恢复系数 

分 类 号：O358[理学—流体力学]