固体火箭技术Issue(5)：711-717,7.DOI:10.7673/j.issn.1006-2793.2014.05.024
ICVI工艺致密化C/C复合材料的数值模拟
Numerical simulation of densification of carbon/carbon composites by ICVI process
摘要
Abstract
In order to investigate the process of the isothermal chemical vapor infiltration( ICVI) and the distribution of velocity and temperature for fabricating carbon/carbon composites, a multi-physical fields coupling models were developed through COM-SOL, including the mass and heat transportation, and the variation of porosity in the densification process. Taking Methane as the precursor, the momentum and energy equations were solved. The results indicate that the temperature rises rapidly to the setting point at the beginning and the distribution of temperature was uniform in the reactor.According to above results, the temperature was set as the constant value in the next step. Then the coupling equations of the mass and momentum conservation and the changing po-rosity equation were calculated to obtain the variation of preform density. The results show that the region of maximum density is dis-tributed in the middle of preform and this region move towards the edge during the densification process. After the preform is infiltra-ted for 150h, the bulk density of simulation agrees well with the experimental data, which demonstrate that the densification model is reliable.关键词
碳/碳复合材料/等温化学气相渗透/多物理场耦合/数值模拟Key words
carbon/carbon composites/isothermal chemical vapor infiltration/multi-physical fields coupling/numerical simu-lation分类
航空航天引用本文复制引用
王建武,李克智,张守阳,李伟..ICVI工艺致密化C/C复合材料的数值模拟[J].固体火箭技术,2014,(5):711-717,7.基金项目
国家自然科学基金(51221001)。 （51221001）
