化工学报2024，Vol.75Issue(z1)：206-216,11.DOI:10.11949/0438-1157.20240413
用于HTPB推进剂浆料的静态混合管数值模拟
Numerical simulation of static mixing tubes for HTPB propellant slurry
摘要
Abstract
Adequate mixing of the curing agent and binder in hydroterminated polybutadiene(HTPB)propellants is critical to propellant performance,and the kenics static mixing tube enables adequate mixing of high-viscosity fluids.The viscous shear curve of the propellant slurry was measured using a Minilab miniature twin-screw rheometer.Numerical simulations of the kenics static mixing tube for HTPB propellant slurries has been carried out by computational fluid dynamics(CFD)to analyze the relationship between the inlet flow rate,the number of elements and the element length-to-diameter ratio of the kenics static mixing tube and the pressure drop and mixing effect.Numerical simulations show that the pressure drop is proportional to the inlet flow rate and linearly related to the number of elements,and more than 45％of the pressure loss is concentrated at the nozzle of the mixing tube for extrusion moulding.8 mixing units can complete 99.9％of the mixing,and 12 mixing units can complete 99.99％of the mixing.The secondary flow in the radial direction increases as the L/D ratio decreases.An increase in the L/D ratio from 0.5 to 1.25 enhances mixing and reduces energy consumption at the same time.关键词
数值模拟/计算流体力学/静态混合/非牛顿流体/聚合物Key words
numerical simulation/computational fluid dynamics/static mixing/non-Newtonian fluids/polymers分类
化学化工引用本文复制引用
郭骐瑞,任丽媛,陈康,黄翔宇,马卫华,肖乐勤,周伟良..用于HTPB推进剂浆料的静态混合管数值模拟[J].化工学报,2024,75(z1):206-216,11.基金项目
上海航天科技创新基金项目(SAST2020-088) （SAST2020-088）
