复合固体推进剂药浆浇铸工艺仿真及优化  

Casting Process Simulation and Optimization of Composite Solid Propellant Slurry

作　　者：李胜婷 庞维强[2] 南风强[1] 邓重清[2] 刘其闽 LI Sheng-ting;PANG Wei-qiang;NAN Feng-qiang;DENG Chong-qing;LIU Qi-min(School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)

机构地区：[1]南京理工大学化学与化工学院,江苏南京210094 [2]西安近代化学研究所,陕西西安710065

出　　处：《火炸药学报》2024年第10期937-944,I0004,共9页Chinese Journal of Explosives & Propellants

摘　　要：为了研究HTPB复合固体推进剂药浆浇铸的最佳工艺参数,采用实验与理论模拟相结合的方法,基于HTPB复合固体推进剂药浆流变性能建立了推进剂药浆流动过程的本构模型;利用有限元软件对HTPB复合推进剂药浆浇铸工艺进行仿真,通过实验验证了仿真结果的可靠性;并对该推进剂药浆浇铸工艺进行了优化,获得了最佳浇铸工艺参数。结果表明,HTPB推进剂是典型的假塑性流体,其黏度随剪切速率增大而降低;实验与仿真对比后的气孔率及浇铸时间误差分别为12.5%和11.25%;其中,温度对浇铸时间的影响最明显,真空度对气孔率影响最明显。In order to obtain the optimal casting process parameters of HTPB composite solid propellant,the constitutive model for the flow process of propellant slurry was established based on the rheological properties of HTPB propellant slurry adopting a combination of experimental and theoretical simulation methods.The casting process of HTPB composite propellant slurry was simulated by using the finite element software,and the reliability of the simulation results was verified through experiments.Moreover,the casting process of the propellant slurry was optimized and the optimal casting process parameters were obtained.The results show that HTPB propellant is a typical pseudoplastic fluid,and its viscosity decreases with increasing shear rate.The porosity and the casting time are 12.5%and 11.25%,respectively after comparison of experiment and simulation.Among them,temperature has the most significant impact on casting time,and vacuum degree has the most significant impact on porosity.

关 键 词：材料力学 复合固体推进剂 流变性能 本构模型 工艺仿真 工艺优化 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V512[航空宇航科学与技术—航空宇航推进理论与工程]