大空间内爆燃泄爆过程数值模拟研究

Numerical Simulation Study of Explosion Venting Process in Large Space

为研究建筑物等较大空间内气体爆燃泄爆过程,采用Fluent软件对9 m^2的方形空间内部泄爆过程进行数值模拟研究,分析了点火位置、泄爆压力对室内超压的影响。结果表明:泄爆压力对最大超压峰值影响较大;远离泄爆口点火时有最快的火焰传播速度和较大的超压,靠近泄爆口点火时火焰传播速度最慢,在靠近点火位置设置泄爆口能有效减小超压。

In order to study the process of gas explosion venting in the buildings, numerical simulation of the internal explosion venting process in 9 m2 square space was carried out by Fluent soltware. The influence of ignition position and vent pressure on overpressure was analyzed. The results show that tile vent pressure has a great influence on the maximum overpressure peak. The back ignition produces fastest flame propagation speed and the larger overpressure, The flame propagation velocity is the slowest when the ignition is close to the vent. Setting the vent close to the ignition position can effectively reduce the overpressurc peak.