摘要
箔条散射是目前海上作战进行电子干扰的有效手段。为此介绍了一种基于计算流体力学(CFD)和离散元方法(DEM)的箔条喷散运动数值模拟方法。该方法基于Euler⁃Lagrange框架,在描述气体流动的Navier⁃Stokes方程中引入了空隙率的概念,同时引入投影面积来考虑固体占据多个气体网格的情况。考虑到湍流的影响,基于雷诺平均法(RANS)对气体流动控制方程进行时均化处理。最后利用该方法对箔条散射进行了数值模拟,同时给出了箔条散射过程和散射结构。该研究为空战雷达无源干扰技术的工程应用提供了理论和技术支持。
Chaff scattering is an effective method for electronic jamming in marine electronic warfare.A nu⁃merical simulation method of chaff scattering motion based on CFD and DEM is introduced.The coupled algo⁃rithm is based on Euler-Lagrange framework.The concept of voidage is considered in Navier-Stokes equations for describing gas flows.The projected area is introduced to consider solid occupying multiple gas grids.Reynolds Average Navier-Stokes is used to homogenize the governing equations of gas flow for considering the influence of turbulence.Finally,numerical simulation of chaff scattering is given by using this method.The scattering motion and structure is also presented simultaneously.This work could provide theoretical and technical support for the engineering application of passive jamming technology in air combat radar.
作者
王栋欢
肖洪
吴丁毅
Wang Donghuan;Xiao Hong;Wu Dingyi(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,Shanxi,China)
出处
《航天电子对抗》
2022年第6期7-11,共5页
Aerospace Electronic Warfare
