检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:马宁[1] 张哲[1] 孙晓朋[1] 秦能[1] 谢中元[1] 陈松[1] MA Ning;ZHANG Zhe;SUN Xiaopeng;QIN Neng;XIE Zhongyuan;CHEN Song(Xi'an Modern Chemistry Research Institute,Xi'an 710065,Shaanxi,China)
机构地区:[1]西安近代化学研究所
出 处:《兵工学报》2019年第12期2440-2446,共7页Acta Armamentarii
基 金:国家国防科技工业局“十三五”火炸药专项项目(2018年)
摘 要:为获得塑料粘结炸药(PBX)共振声混合的工艺规律,实现PBX在高安全、低能耗条件下的高效混合,以固含量为88%的浇注PBX模拟物为对象,研究加速度和混合时间对PBX模拟物混合过程的影响。实验设备为5 kg级共振声混合设备,实验量级为1 500 g,混合加速度变化范围为0~60 g(g=9. 8 m/s2)。实验结果表明:在不同混合阶段,物料状态不同,所需最小混合加速度也不同。根据典型物料状态,将混合过程划分为颗粒混合区、固体与液体混合区、成球区、黏弹区和流化区5个区域,前3个混合区域实现安全条件下物料的预混,黏弹区和流化区是最高效的混合区域,实现物料的全场精细混合。根据每个区域所需最小混合加速度不同,定义起混点、聚合点和流化点3个关键点,一般3个关键点依次增大,分别约为10 g、25 g、40 g.研究结果所得混合工艺可用于指导PBX炸药及其他高黏态高固含量物料体系的共振声混合。In order to obtain the resonance acoustic mixing process rule and achieve the efficient mixing of plastic bonded explosive( PBX) under the conditions of safety and low energy consumption,the effects of mixing acceleration and time on mixing process are studied for PBX simulant with 88% solid content.In the experiment,a 5 kg scale resonant acoustic mixer is used,the sample scale is 1 500 g,and the mixing acceleration varies from 0 g to 60 g( g = 9. 8 m/s2). The experimental results show that the material state changes with the mixing time,and the different minimum mixing accelerations are required for different material states. According to the typical material state in the mixing process,the mixing process is divided into five zones: granule mixing zone,granule-liquid mixing zone,cohesion spheroidizing zone,viscoelastic mixing zone and fluidizing zone. The material is premixed in previous three stages under a relatively safe condition,and is micro-mixed in viscoelastic and fluidizing mixing zones in the whole flow field;according to the required minimum mixing acceleration,three key points are defined: mixing point,aggregation point and fluidization point. Generally,the three key points increase successively,and they are about 10 g,25 g and 40 g,respectively. The mixing process can be used to guide the resonance acoustic mixing process of PBX and other materials with highly viscous and highly solid content.
分 类 号:TQ560.6[化学工程—炸药化工] TJ55[兵器科学与技术—军事化学与烟火技术]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.249