摘要
针对乙烯-空气爆燃火焰在弯管阻火器中的传播与淬熄过程进行了数值模拟研究,采用了标准模型来描述爆炸中出现的湍流,选用EBU-Arrhenius燃烧模型来描述燃烧过程中湍流燃烧速率的变化,采用PISO算法对速度和压力耦合方程组进行解耦。模拟结果显示,在经过弯管时,火焰传播振荡加速,速度最高值达到43m/s。随后火焰传播速度逐渐减小,在到达阻火单元附近时产生了淬熄现象,火焰传播速度趋近于0 m/s。
Numerical simulation study on the propagation and quenching process of ethylene air deflagration flame in elbow flame arrester was carried out. The standard k-ε model was used to describe the turbulent flow in the explosion. EBU-Arrhenius combustion model was used to describe the change of turbulent flow combustion rate during combustion. PISO algorithm was used to decouple speed and pressure coupling equations. The simulation results showed that the flame propagation speed oscillation accelerated and the maximum speed reached 43 m/ s when passing through a elbow. Then the flame propagation speed decreased gradually, and quenching occurred when it reached near the flame arrester. The flame propagation speed approached 0 m/s.
作者
杨铭斯
刘刚
孙少辰
张志军
YANG Mingsi;LIU Gang;SUN Shaochen;ZHANG Zhijun
出处
《化工装备技术》
CAS
2018年第5期18-22,共5页
Chemical Equipment Technology
关键词
数值模拟
弯管阻火器
淬熄
爆炸压力
火焰传播速度
Numerical simulation
Elbow flame arrester
Quenching
Explosion pressure
Flame propagation speed
