大型通道中粉尘爆炸的数值模拟

NUMERICAL SIMULATION OF DUST EXPLOSION IN A LARGE-SCALE APPARATUS

将火焰阵面视作无限薄的内边界,流场被分为两部分。根据火焰阵面的守恒方程,火焰两侧的特征线方程以及湍流燃烧公式可求出火焰两侧的参数。再根据管道两端的边界条件,利用 Rubin-Lax-Wendroff 格式进而求得不同时刻管内流场的结构。本文凭此对大型通道中的粉尘爆炸进行了数值模拟和讨论。

The flame front,as an inside boundary,divides the fluid field into two parts,when its thickness is infinitely thin.According to conservation equations,charac- teristic equations and a turbulent combustion equation,parameters of the fluid field be- fore and behind the flame front can be obtained.The structures of the fluid field in the tube at different time are got further by using Rubin-Lax-Werdroff scheme with bound- ary conditions at the ends of the tube and the flame front.Based on the reason above, dust explosion in a large-scale tube apparatus have been simulated numerically and dis- cussed in this paper.