高压物理学报2025，Vol.39Issue(5)：1-13,13.DOI:10.11858/gywlxb.20251008
界面邻近效应对激波诱导重气柱演化的影响
Interface Proximity Effect on the Evolution of a Shock-Accelerated Heavy Gas Cylinder
摘要
Abstract
To uncover the interface proximity effect arising from the interaction between shock wave and near-surface impurity and hole of material in practical applications,a simplified mechanism study on the influence of downstream planar heavy-light interfaces on the evolution of a shock-accelerated heavy gas cylinder was carried out through numerical simulation.The findings reveal that the diffracted and transmitted wave systems formed by the incident shock impacting the heavy gas cylinders successively interact with the downstream planar slow-fast interface,leading to the formation of wave systems that reflect back and forth between the gas cylinder and the downstream planar slow-fast interface.Significantly,these wave systems not only govern the evolution of the gas cylinder interface but also trigger the generation of jets at the downstream planar slow-fast interfaces.Under diverse interfacial spacing conditions,the type of reflected waves originating from the diffracted wave system outside the gas cylinder varies at the downstream interface,and the sequence of the reflected wave system and the focused wave system inside the gas cylinder interacting with the right pole of the gas cylinder is different.When the interfacial distance is narrow,the gas cylinder jet can permeate the gap fluid sandwiched between the gas cylinder and the downstream slow-fast interface and couple with the jet at the downstream planar slow-fast interface,which significantly promotes the evolution of the gas cylinder jet.As the interfacial distance increases,the jet coupling phenomenon progressively wanes,and the gas cylinder jet succumbs to the inhibitory effect of the vortex pair within the gas cylinder.With a further augmentation in interfacial distance,the gas cylinder jet will be promoted by the stretching effect of the reflected rarefaction wave system at the downstream interface.In addition,under different interface spacing conditions,the presence of a downstream planar slow-fast interface invariably augments the development of interfacial width,height,as well as circulation deposition.关键词
激波/Richtmyer-Meshkov不稳定性/气柱/射流/微喷射/环量Key words
shock wave/Richtmyer-Meshkov instability/gas cylinder/jet/micro-jet/circulation分类
数理科学引用本文复制引用
杨欢欢,张恩来,李欣竹,邹立勇..界面邻近效应对激波诱导重气柱演化的影响[J].高压物理学报,2025,39(5):1-13,13.基金项目
国家自然科学基金(12102407,12472397,92052108) （12102407,12472397,92052108）
冲击波物理与爆轰物理全国重点实验室基金(JCKYS2023212003,JCKYS2022212006) （JCKYS2023212003,JCKYS2022212006）
