泄压口比率对气体泄爆过程中的动力学行为的影响  

Effect of pressure-orifice ratio on dynamic behavior during gas venting

作　　者：任少峰[1] 陈先锋[1] 王玉杰[1] 陶明[2] 陈明[1] 

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《煤炭学报》2011年第5期830-833,共4页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50804038)

摘　　要：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。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%.

关 键 词：泄压口 可燃气体 泄爆 数值模拟 

分 类 号：X932[环境科学与工程—安全科学]