含能材料2025，Vol.33Issue(11)：1288-1299,12.DOI:10.11943/CJEM2025055
多腔室连续混合工艺及结构参数对压力及剪切力影响的模拟
Simulation of the Influence of Multi-chamber Continuous Mixing Process and Structural Parameters on Pressure and Shear Stress
樊超 1李博豪 1张彭超 1魏宗亮 1秦能 1马宁 1谢中元1
作者信息
- 1. 西安近代化学研究所,陕西 西安 710065
- 折叠
摘要
Abstract
To enhance the understanding of safety of multi-chamber mixing processes,a multiphase flow CFD numerical model based on the Eulerian method was established for the continuous mixing of multi-component materials in a multi-chamber knead-er,taking a cast polymer bonded explosive(PBX)as the object.Experimental verification was conducted to confirm the reliabili-ty of the model.Based on the model,the influence laws of key process and structural parameters including blade rotation speed,kneading clearance and blade profile on the mixing safety stimulus were studied.The results show that the pressure level gradual-ly decreased from the feeding chamber to the discharging chamber.Increasing the blade rotation speed was beneficial for reduc-ing the pressure in the chambers,but the shear stimulus significantly increased.As the blade rotation speed increased from 15 r·min-1 to 75 r·min-1,the peak pressure in the kneader decreased from 402966 Pa to 258107 Pa,and the peak shear stress in-creased from 6268.5 Pa to 16607.9 Pa.Increasing the kneading clearance significantly reduced the pressure and shear stress in the chambers.As the kneading clearance increased from 1 mm to 5 mm,the peak pressure in the kneader decreased from 391094 Pa to 284478 Pa,and the peak shear stress decreases from 8320.5 Pa to 3982.6 Pa.Compared with the two-wing-two-wing blades,four-wing-two-wing blades produced stronger shear stimulus due to more kneading sites,but the blade profile had a smaller impact on the kneading pressure.When the four-wing-two-wing blades and two-wing-two-wing blades were used in chambers 1-7,the peak shear stresses in the kneader were 7481.3 Pa and 4518.1 Pa,respectively.关键词
多腔室连续混合/多相流/数值仿真/动网格/压力/剪切力/工艺安全Key words
multi-chamber continuous mixing/multiphase flow/numerical simulation/dynamic mesh/pressure/shear stress/pro-cess safety分类
武器工业引用本文复制引用
樊超,李博豪,张彭超,魏宗亮,秦能,马宁,谢中元..多腔室连续混合工艺及结构参数对压力及剪切力影响的模拟[J].含能材料,2025,33(11):1288-1299,12.
