泄压口比率对气体泄爆过程中的动力学行为的影响

以流体力学基本方程和燃烧反应方程为基础，建立k－ε湍流模型和燃烧模型，对管道内可燃气体泄爆过程进行模拟，讨论了泄压口比率大小对管道内爆炸压力与火焰速度的影响规律。研究发现：当泄压口比率小于30%时，爆炸压力与火焰速度峰值随泄压口比率呈急剧变化的线性关系；而当泄压比大于30%时，爆炸压力与火焰速度几乎不受泄压口比率的影响。

Effect of pressure orifice ratio on dynamic behavior during gas venting

The k－ε turbulent model and the combustion model were presented on the basis of fluid mechanics equations and combustion reaction equations;the venting process of flammable gas was numerically simulated in pipeline.The impact law of the pressure orifice ratio to explosion pressure and flame velocity was discussed.It is a linear relationship between pressure and peak velocity with size of pressure orifice when the pressure orifice ratio is less than 30%,and two parameters scarcely change with pressure orifice ratio for more than 30%.