[1]熊奥①,阮建①,丁亚军①②,等.SC-CO2及工艺条件对高固含量发射药CA/CaCO3体系挤出停留时间的影响[J].爆破器材,2020,49(05):29-35,41.[doi:10.3969/j.issn.1001-8352.2020.05.006]
　XIONG Ao,RUAN Jian,DING Yajun,et al.Effect of SC-CO2 and Process Conditions on Residence Time of High Solid Content Propellant Substitute in Extrusion[J].EXPLOSIVE MATERIALS,2020,49(05):29-35,41.[doi:10.3969/j.issn.1001-8352.2020.05.006]
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SC-CO2及工艺条件对高固含量发射药CA/CaCO3体系挤出停留时间的影响()
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《爆破器材》[ISSN:1001-8352/CN:32-1163/TJ]

卷:
49
期数:
2020年05
页码:
29-35,41
栏目:
爆炸材料
出版日期:
2020-10-05

文章信息/Info

Title:
Effect of SC-CO2 and Process Conditions on Residence Time of High Solid Content Propellant Substitute in Extrusion
文章编号:
5434
作者:
熊奥①; 阮建①; 丁亚军①②; 应三九①
①南京理工大学化工学院（江苏南京，210094）
②南京理工大学特种能源材料教育部重点实验室（江苏南京，210094）
Author(s):
XIONG Ao①;  RUAN Jian①;  DING Yajun①②;  YING Sanjiu①
① School of Chemical Engineering，Nanjing University of Science and Technology (Jiangsu Nanjing, 210094)
② Key Laboratory of Special Energy Materials in Ministry of Education, Nanjing University of Science and Technology (Jiangsu Nanjing, 210094)
关键词:
高固含量发射药; 超临界二氧化碳; 停留时间
Keywords:
high solid content propellant;  supercritical carbon dioxide;  residence time
分类号:
TQ562
DOI:
10.3969/j.issn.1001-8352.2020.05.006
文献标志码:
A
摘要:
为了研究挤出过程中超临界二氧化碳（SC-CO2）对高固含量发射药停留时间分布的影响，采用示踪粒子轨迹跟踪技术研究了醋酸纤维素（CA）/碳酸钙（CaCO3）/SC-CO2代料停留时间的影响因素，结合反应器流动模型确定了CA/CaCO3/SC-CO2在机筒中的流动情况。数值模拟结果显示,注入体积流量为0.1 mL/min的SC-CO2后，平均停留时间缩短了35%，Pe减小了196.4；螺杆转速由6 r/min增加到14 r/min时，平均停留时间缩短了54.5%，Pe减小了210.8；当机筒温度从40 ℃升高至60 ℃，平均停留时间减少了19%，Pe减小了75.0。反应器流动模型拟合结果显示,螺杆转速由6 r/min增加到14 r/min时，CA/CaCO3/SC-CO2的体积分数从0.65降低到0.62。由此可知，SC-CO2的加入、螺杆转速的增加以及机筒温度的升高都显著缩短了物料的停留时间，并促进了轴向混合，CA/CaCO3/SC-CO2在螺杆内的主要流型为活塞流。
Abstract:
In order to study the effect of supercritical carbon dioxide (SC-CO2) on the residence time distribution of high solid propellant in extrusion process, numerical simulation of CA/CaCO3/SC-CO2 substitutes was performed to analyze the influencing factors of residence time by particle tracing method. Combined with reactor flow pattern, the main flow patterns of CA/CaCO3/SC-CO2 in the barrel were determined. The results show that after injection of SC-CO2 with a volume flow of 0.1 mL/min, the mean residence time reduces by 35%, and the Pe?number reduces by 196.4. When the screw speed increases from 6 r/min to 14 r/min, the mean residence time reduces by 54.5%, and the Pe?number decreases 210.8. The mean residence time reduces by 19% and the Pe?number reduces by 75.0 when the cylinder temperature increases from 40℃ to 60℃. The fitting results show that the volume fraction of CA/CaCO3/SC-CO2 decreases from 0.65 to 0.62 as the screw speed increases from 6 r/min to 14 r/min. The residence time of the material is significantly shortened, the axial mixing is enhanced by the addition of SC-CO2, and the acceleration of screw speed and the increase in barrel temperature. Plug flow is the dominant flow pattern of CA/CaCO3/SC-CO2 in the screw.

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备注/Memo

备注/Memo:
收稿日期：2019-12-05
基金项目：特种能源材料教育部重点实验室（南京理工大学）开放基金项目资助（2019SEM05）
第一作者：熊奥（1994－），男，硕士研究生，主要从事含能材料研究。E-mail:18892681625@163.com
通信作者：丁亚军（1990－），男，讲师，主要从事含能材料研究。E-mail:dyj@njust.edu.cn
更新日期/Last Update: 2020-10-05