基于折射率匹配技术的粗糙床面液下溃坝铺展动力学研究  

INVESTIGATION OF IMMERSED GRANULAR COLLAPSE SPREAD OVER A ROUGH BASE USING REFRACTIVE INDEX MATCHING TECHNOLOGY

作　　者：焦佳珺 贺俊力 吕鹏飞 潘孟晗 孙云辉 刘青泉[1] 王晓亮 JIAO Jiajun;HE Junli;LYU Pengfei;PAN Menghan;SUN Yunhui;LIU Qingquan;WANG Xiaoliang(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;College of Engineering,Southern University of Science and Technology,Shenzhen 518055,Guangdong,China;Beijing Institute of Technology(Zhuhai),Zhuhai 519088,Guangdong,China)

机构地区：[1]北京理工大学宇航学院,北京100081 [2]南方科技大学工学院,广东深圳518055 [3]北京理工大学(珠海),广东珠海519088

出　　处：《力学与实践》2025年第2期354-363,共10页Mechanics in Engineering

基　　金：国家自然科学基金项目(12032005,12172057)资助。

摘　　要：基于折射率匹配技术,对致密颗粒堆积体在粗糙底床液下溃坝的动力铺展过程进行了详细研究,探究了液相黏度和高宽比对溃坝特性的影响,给出了内部典型截面位置处颗粒流发展运动过程。结果表明,粗糙底床对坝体输运起抑制作用,具体表现为坝体流通距离降低和堆积高度增加,同时粗糙底床颗粒向液体的能量传递效率降低,导致最终堆积的波浪分布显著减弱。另外,在一些工况下观测到颗粒堆积体前缘发生抬头的现象,但其物理机制还有待揭示。This paper,based on the refractive index matching technique,conducted a detailed study on the dynamic spreading process of dense granular columns during the immersed granular collapse over a rough bed.It explores the effects of liquid phase viscosity and the aspect ratio on the characteristics of the collapse and presents the development and motion process of granular flow at typical cross-sectional positions.The results reveal that the rough bed exerts a restraining effect on the transport of the granular,which is specifically manifested by a reduction in the dam's runout length and an increase in the final height.Besides,the energy transfer efficiency from the granular to the liquid on the rough bed is decreased,significantly weakening the final accumulated wave distribution.Additionally,in certain operating conditions,the phenomenon of the granular accumulation body's front edge lifting is observed,although its physical mechanism remains to be elucidated.

关 键 词：折射率匹配 液下溃坝 粗糙基底 铺展动力学 堆积轮廓 

分 类 号：O359[理学—流体力学]