硅酸盐学报2011，Vol.39Issue(5)：789-793,5.
包含毛细流动的自蔓延高温合成过程的模型和模拟
Modeling and Simulation of Self-Propagating High-Temperature Synthesis Including Capillary Flow
摘要
Abstract
The Fourier model is widely used to simulate the self-propagating high-temperature synthesis (SHS) process, but this model does not reflect the mass transfer process and its influence on heat transfer. In the process of SHS in a compacted block, burning,melting and cooling occur rapidly in a rather short time. The duration is too short to complete the flow of the convection and diffusion.However, the capillary flow is not restricted during the short duration. Thus, the capillary flow could be the main mass transfer process in SHS. In this paper, the function of fill factor caused by the capillary flow was derivated, a novel model combining with the fill factor and the Fourier model was proposed. The SHS process was simulated with the proposed model and the Fourier model for TiC system, respectively. The results by the proposed model are different in the combustion temperature, combustion stability and combustion propagation velocity, compared to the results by the Fourier model. The proposed model of capillary flow can reflect heat and mass transfer behaviors simultaneously, which can give more information to understand the actual SHS process.关键词
自蔓延高温合成/毛细流动/填充率/数值模拟Key words
self-propagating high-temperature synthesis/ capillary flow/ fill factor/ numerical simulation分类
化学工程引用本文复制引用
贺加贝,傅增祥,冯一川,赵雅莎,孙利娟,赵江潮..包含毛细流动的自蔓延高温合成过程的模型和模拟[J].硅酸盐学报,2011,39(5):789-793,5.基金项目
西北工业大学基础科学基金和创新基金资助. （）
