电弧等离子体射流对不同性质发射药的烧蚀特性  

Ablation Characteristics of Different Propellants Interacted by Arc Plasma Jet

作　　者：杭玉桦 李兴文[1] 原帅[1] 贾申利[1] 

机构地区：[1]西安交通大学电力设备与电气绝缘国家重点实验室,西安710049

出　　处：《高电压技术》2015年第6期2093-2099,共7页High Voltage Engineering

基　　金：国家自然科学基金(11375140)~~

摘　　要：为深入研究等离子体与不同性质发射药的相互作用,一个综合了热传导模型和动力学烧蚀模型的等离子体对发射药作用模型被用来评估不同性质的发射药的烧蚀特性。预估-校正算法被用来快速精确地求解模型,结合实验获得不同充电电压下不同类型发射药的烧蚀质量,最终获得不同性质发射药的平均输入能流、烧蚀率和发射药表面温度。实验与仿真结果表明:热传导系数的大小决定了发射药的烧蚀量,因而含硝化棉(NC)发射药中,烧蚀量的大小正比于NC的含量;发射药的烧蚀焓增加,则平均输入能流变大,烧蚀率降低和发射药表面温度减少;在输入相同的电源能量下,传统双基发射药的烧蚀质量最大,高能量密度低敏感发射药次之,硝铵发射药最低;然而随着充电电压的提升,硝铵发射药的烧蚀效率提升最为显著。In order to study the interaction between plasma and propellants, combining the heat conduction model and kinetic ablation model,we established a plasma-propellant interaction （PPI） model to evaluate the ablation characteristics of different propellants. The model is solved effectively and precisely by using the prediction-correction method; along with the ablation mass of different propellants under different charging voltages acquired by experiments, we calculated the average heat flux, ablation rate, and surface temperature of the propellants. The results show that the ablation mass of a propellant is determined by its thermal conductivity, thereby, for the propellants containing nitrocellulose （NC）, their ablation mass is proportional to the content of NC. Meanwhile, with the increase of ablation enthalpy, the average heat flux increases, the ablation rate decreases, and the surface temperature decreases. With the same energy input, traditional double base propellants have the highest ablation mass, while the energetic thermoplastic elastomer （ETPE） propellants have lower ablation mass and the nitramine propellants have the lowest. However, with increasing energy input, the abla- tion efficient ofnitramine propellants increases dramatically.

关 键 词：电热化学发射 等离子体与发射药相互作用 预估-校正算法 物性参数 输入能流 烧蚀率 表面温度 

分 类 号：TQ562[化学工程—炸药化工]