秒级隔板延期装置输入输出特性的实验及数值模拟

Numerical Simulation and Experimental Study on Imput and Output Characteristic of Second-Level Clapboard Delay Equipment

为了将热传导技术应用到秒级延期药中控制延期时间,采用以钨系延期药作为能量输入药剂的金属隔板装置对延期时间的影响因素作了实验研究,并采用ANSYS软件进行了数值模拟验证.结果表明,在热传导过程中,第二点火药的发火是从延期装置隔板输出端的中心点开始;第二点火药的5s爆发点为189.33℃,燃点较低,利于隔板点火;装药密度越大,延期时间精度越高,当装药密度为4.0g/cm3时,相比装药密度为3.2g/cm3,其相对误差由11.2%下降到1.6%;利用Origin的数值拟合得到延期时间与隔板厚度呈二次函数关系.

The application of heat transfer technology to control the delay time of using second level delay composition is researched in this work.Experiments were carried out to investigate the factors of affecting delay time of the metal clapboard equipment in which the tungsten type delay composition was used as the energy input one.Numerical simulation was implemented using ANSYS software and its results were compared with the experimental ones.The research findings show that,during the heat transfer,the second ignition composition is ignited at the center of the clapboard output terminal.The 5s ignition temperature of the second ignition composition is 189.33℃,which is relatively low and is easy to be ignited.Also,it is found that the bigger the charge density is,the more accurate the delay time is.When the charge density changes from 3.2g/cm3 to 4.0g/cm3,the relative error of delay time is decreased from 11.2% to1.6%.Moreover,by Origin numerical fitting method,the relation of delay time with the thickness of metal clapboard is a quadratic function.