起爆方式对圆台型云爆弹装置燃料抛撒初期运动规律的数值模拟  

Numerical Simulation on the Effects of Initiation Methods on the Initial Movement of Fuel Dispersal in a Frustum-shaped FAE Device

作　　者：杨振寰 袁野 刘鑫 曲嘉[1] YANG Zhenhuan;YUAN Ye;LIU Xin;QU Jia(College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150006,Heilongjiang,China)

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150006

出　　处：《兵工学报》2024年第9期3071-3081,共11页Acta Armamentarii

基　　金：国家自然科学基金项目(11972007)。

摘　　要：为提高燃料空气炸弹(Fuel Air Explosive,FAE)装置爆炸抛撒燃料的极限速度并使速度更加平均,在不改变现有装置整体结构的情况下,采用数值模拟的方法研究起爆方式对FAE装置燃料抛撒径向极限速度的影响。使用有限元分析软件的任意拉格朗日-欧拉算法对圆台型FAE装置抛撒燃料进行数值模拟,对比单点起爆、多点起爆和近似线起爆情况下相同位置节点的径向抛撒速度变化情况。研究结果表明,对于燃料上的单元而言,距离较近的起爆点设置会对这个单元上燃料的抛撒运动产生抑制效果,近似线起爆的方式可以使云雾抛撒得更加均匀,为FAE爆炸燃料抛撒数值模拟的进一步细化研究奠定了基础。In order to enhance the maximum dispersal speed of fuel during the explosion of fuel-air explosive(FAE)devices and achieve a more uniform speed distribution,the paper investigates the influences of detonation methods on the radial maximum speed of fuel dispersal in FAE device.Numerical simulation techniques are employed to analyze the influences above while maintaining the overall structure of the existing device.Specifically,the ALE algorithm implemented in LS-DYNA software is utilized to numerically simulate the fuel dispersal in a frustum-shaped FAE device.The changes in radial dispersal speeds of nodes located at identical positions under the conditions of single point initiation,multi-point initiation and approximate line initiation,are compared.The results demonstrate that positioning the initiation point closer to the unit exerts a restraining effect on the dispersal motion of the fuel within that specific element.Additionally,for a certain point on the fuel,the adoption of the approximate line initiation method proves effective in achieving a more uniform dispersal of fuel cloud and mist.This finding serves as a foundational step towards the further refinement of numerical simulations concerning FAE explosive fuel dispersal.

关 键 词：燃料空气炸弹 流固耦合 抛撒速度 起爆方式 

分 类 号：O383[理学—流体力学]