摘要
通过在Euler能量守恒方程中加入一表示能量释放速率物理意义的“开关函数”得到了Euler坐标系中描述有限能量释放速率的二维可燃气云爆燃场的数学模型 ,给出了初值及边界条件的取法 ,并做了相关的模拟算例 .模拟计算得出的爆燃时间 压力曲线与实验结果吻合很好 .
The compressed wave produced by the flame in combustible vapour cloud opening to air was researched by numerical simulation. Based on the fact that the energy-releasing speed is limited in the process of deflagration produced by combustible vapour cloud opening to air, the mathematical models expressed by Euler equation was refined further via importing a on-off function, which means energy wave mode. The new mathematical model including on-off function not only reflects the deflagration characteristic of limited energy-releasing speed, but also simulates the whole deflagration process via a equation. The solution of the equation and a computational example were given. The computation results were more consistent with the results of model experiment than other model results. The simulation results showed that the deflagration of the combustible vapour cloud opening to air could only produce weak shock waves and was nonideal explosions different from ideal explosions.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2003年第3期383-387,共5页
CIESC Journal
基金
国家自然科学基金资助项目 (No 5 95 780 47) .~~
