5-Ⅱ材料的热物理性能及热解数值模拟  

Thermophysical properties and pyrolysis numerical simulation of 5-Ⅱ materials

作　　者：唐敏[1] 张岗[2] 史宏斌[1] 高波[2] 

机构地区：[1]中国航天科技集团公司四院四十一所,西安710025 [2]中国航天科技集团公司第四研究院,西安710025

出　　处：《固体火箭技术》2015年第4期562-565,572,共5页Journal of Solid Rocket Technology

摘　　要：测试了5-Ⅱ材料的热物理性能,获得了温度相关的比热容和热导率参数;研究了该材料的分解数学模型,通过热失重实验,获得了热解反应温度和热解动力学参数;通过对ABAQUS软件二次开发进行了某长时间工作喉衬背壁的热解数值模拟。结果表明,5-Ⅱ材料热解过程主要发生在280~925℃之间,尤其在510~650℃范围内热解速度最快,其活化能约为99.9 k J/mol,指前因子为122.7×106/s;常温至1 000℃,5-Ⅱ材料的热导率和比热随温度呈＂W＂型变化;背壁热解数值模拟结果和试验结果较吻合。Thermal and physics properties of 5-Ⅱ material were experimented,and the specific heat and thermal conductivities were obtained. The pyrolysis model was researched. Pyrolysis temperature and kinetic parameters were obtained by thermal loss experiment. Pyrolisis simulation on a long working throat was achieved by a user expander film on ABAQUS code. The results show that the pyrolysis temperature domain of 5-Ⅱ material is between 280 ℃ and 925 ℃,and the major domain is from 510 ℃ to 650℃. The activation energy and kinetic factor are 99. 9 k J / mol and 122. 7×106/ s,respectively. Specific heat and thermal conductivities are changed with temperature like‘W＇from room temperature to 1 000 ℃. The prediction carbonization depth values are coincided with experiment results.

关 键 词：背壁绝热层 活化能 指前因子 热导率 比热容 热解 

分 类 号：V258[一般工业技术—材料科学与工程]