含能粉体材料声共振混合过程及机理研究  

Process and mechanism of energetic powders by resonant acoustic mixing

作　　者：陆志猛 胡期伟[1,2] 李洪旭 郭翔[1,2] LU Zhimeng;HU Qiwei;LI Hongxu;GUO Xiang(Science and Technology on Aerospace Chemical Power Laboratory,Xiangyang 441003,China;Hubei Institute of Aerospace Chemotechnology,Xiangyang 441003,China)

机构地区：[1]航天化学动力技术重点实验室,襄阳441003 [2]湖北航天化学技术研究所,襄阳441003

出　　处：《固体火箭技术》2024年第3期405-410,共6页Journal of Solid Rocket Technology

摘　　要：含能粉体材料混合时极易发生危险,对混合装置的本质安全度要求高。声共振混合可以实现材料迅速流化以及均匀、高效、安全的混合,但固-固颗粒混合机制尚不明确。针对含能粉体材料声共振混合过程中固-固颗粒相互作用问题,分析了在力场作用下的颗粒流动机制和声场作用下的微流效应;采用基于离散单元仿真(EDEM)的Hertz-Mindlin(no slip)模型,对15%填充率的KNO_(3)和B粉在不同垂直加速度下的运动状态、能量状态进行了模拟分析,并设计了与之对应的正交实验进行应用验证。结果表明,颗粒间的平均受力和单颗粒的平均能量均与颗粒粒径正相关,这与在一定尺寸范围内颗粒直径越小声辐射力和微流场力越大的理论推导结果相符,正交实验结果验证了声共振混合点火药相较于传统混合装备具有更好的产品性能和近乎5倍的混合效率。Energetic powder materials are sensitive in the process of mixing,which requires high intrinsic safety of the mixing device.The resonant acoustic mixing(RAM) features rapid fluidization and homogeneous,efficient,and safe mixing,but the solid-solid particle mixing mechanism is still unclear.Aiming at the problem of solid-solid particle interaction in the process of acoustic resonance mixing of energetic powder materials,the particle flow mechanism under the action of force field and the microfluidic effect under the action of sound field were analyzed.The Hertz-Mindlin(no slip) model based on the discrete element simulation(EDEM) was used to simulate and analyze the motion state and energy state of KNO_(3) and B powder with 15% filling rate under different vertical accelerations,and the corresponding orthogonal experiment was designed to verify the application.The results show that the average force between particles and the average energy of a single particle are positively correlated with the particle size,which is consistent with the theoretical derivation results that the smaller the particle diameter is,the greater the acoustic radiation force and the micro-flow field force are in a certain size range.The results of orthogonal experiment verify that the RAM ignition charge has better product performance and nearly five times the mixing efficiency than the traditional mixed equipment.

关 键 词：声共振混合 含能粉体材料 混合机理 点火药 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]