摘要
针对大容量氧烛内含氧材料的反应过程中,为维持氯酸盐分解温度,导致机械外壳温度过高的问题,需进行热防护并维持内部温度场恒定;将氧烛简化为一维稳定导热模型,对比计算隔热防护前后热损量;基于ANSYS数值模拟,对三维模型进行热损态分析,研究二氧化硅气凝胶毡对氧烛的隔热效果;计算结果表明:二氧化硅气凝胶棉毡可以有效降低氧烛外壳最高温度,减缓外壳温升速率;在45 min反应放氧过程中,10 mm厚二氧化硅气凝胶棉毡可将最高温度控制在50℃以下。
For the reaction process of oxygen material of high-capacity oxygen-generation candles,the fact that in order to maintain the temperature of chlorate,the mechanical shell has too high temperature and it needs heat insulation protection and maintains constant internal temperature field. The oxygen-generation candles were simplified as one-dimensional stead heat conduction model,and the heat loss before and after the heat insulation protection were calculated. The heat loss of three-dimensional model was analyzed and the heat insulation effect of silica aerogel felt was researched based on ANSYS numeral simulation. The calculation results show that silica aerogel felt can effectively reduce the highest temperature of the shell and slow heating rate. The 10 mm silica aerogel felt make the highest temperature below 50℃ during 45 min oxygen-release process.
出处
《四川兵工学报》
CAS
2015年第12期35-38,共4页
Journal of Sichuan Ordnance
关键词
大容量氧烛
隔热防护
热损
ANSYS
high-capacity oxygen-generation candles
heat insulation protection
heat loss
ANSYS
