摘要
火药燃烧产生的高压燃气是火工装置工作的能量来源,因此,了解火药燃烧特性对火工装置设计具有重要意义。基于炸药多项式反应模型,建立了火药燃烧的单项式数学模型,描述火药的宏观燃烧和微观反应过程。采用密闭爆发器测压试验拟合火药模型参数,建立了密闭爆发器测压试验的计算模型,将数值模拟结果与试验结果进行拟合,获得了SL17火药模型参数。将拟合得到的SL17火药模型参数代入某弹射器工作过程的数值模拟计算,验证火药燃烧模拟及参数的准确性。计算结果表明,密闭爆发器试验结果可以用于拟合火药燃烧模型参数;采用该模型和参数计算的弹射器运动过程可以完整反映弹射器弹射分离过程;计算得到的弹射分离速度与试验测量值吻合性较好,表明火药燃烧模型可以用于火工装置工作过程仿真计算。
The energy source of most pyrotechnic devices comes from propellant burning.Therefore,understanding of propellant burning is of importance to design pyrotechnic devices.In this paper,based on the polynomial equation of explosive reaction,a monomial reaction model has been established,which is called Propellant Deflagration Model.The closed vessel test is used for fitting the PDM parameters,and the calculation model of closed vessel is built,and the PDM parameters of SL17 is obtained by fitting the calculation results to the test results.Finally,the working process of a catapult driving by SL17 deflagration was simulated to verify the accuracy of PDM and parameters.The calculation results show that the closed vessel test could be used to fit the PDM parameters,and the calculation of catapult could reflect the separation process completely.The ejection speed of calculation is in good agreement with the test results,which show that the PDM can be used for simulation of pyrotechnic device.
作者
刘群
蔡文健
杨昭
周传霞
LIU Qun;CAI Wenjian;YANG Zhao;ZHOU Chuanxia(Beijing Institute of Space Mechanics and Electricity,Beijing 100076,China)
出处
《宇航总体技术》
2022年第5期56-61,共6页
Astronautical Systems Engineering Technology
