含能材料2017，Vol.25Issue(3)：178-183,6.DOI:10.11943/j.issn.1006-9941.2017.03.001
AP/HTPB推进剂微尺度燃烧特性的数值分析
Numerical Simulation of Micro-scale Combustion Characteristics of AP/HTPB Propellant
摘要
Abstract
To study the microscale combustion characteristics of ammonium perchlorate/hydroxyl-terminated polybutadiene(AP/HTPB) composite propellant particle,a 2D steady state combustion model of a periodic sandwich unit was established based on gas-solid coupling,using simplified two-step global chemical reaction kinetic mechanism.The microscale combustion characteristics of AP/HTPB were numerically analyzed by FLUENT software.Results show that under the condition of volume fraction of AP as 0.75,at the low pressure of ＜0.4 MPa,the overall flame of AP/HTPB combustion is a premixed combustion and the burning rate of AP is lower than that of HTPB.With increasing the pressure,when the pressure is more than 2.5 MPa,the flame reveals in a diffusion structure and the burning rate of AP is higher than that of HTPB.The higher the pressure,the stronger the thermal feedback from gas phase to solid phase,and the higher the temperature and burning rate on coupled surface.The volume release rate in the gas phase increases with increasing the pressure,the exothermic region contracts and the two connected exothermic core regions split to two independent core regions.When the combustion pressure is constant (2.5 MPa) and the volume fraction of AP changes from 0.7 to 0.95,the smaller the AP content,the relatively larger the binder HTPB width in a periodic sandwich unit,the flame surface tends to split into two narrow and long strip flame surface,and the temperature increases with splitting.关键词
高氯酸铵/端羟基聚丁二烯(AP/HTPB)/含能颗粒/火焰结构/燃速/数值模拟Key words
perchlorate/hydroxyl-terminated polybutadiene(AP/HTPB)/energetic particle/flame structure/burning rate/numerical modeling分类
军事科技引用本文复制引用
马龙泽,余永刚..AP/HTPB推进剂微尺度燃烧特性的数值分析[J].含能材料,2017,25(3):178-183,6.基金项目
国家自然科学基金资助(51176076) （51176076）
