爆破2025，Vol.42Issue(2)：13-21,110,10.DOI:10.3963/j.issn.1001-487X.2025.02.002
不同长径比对甲烷/空气预混爆炸升压特性影响研究
Effect of Length-to-diameter Ratio on Overpressure Characteristics of Methane/Air Premixed Explosions
摘要
Abstract
To explore the influence of ignition position change on overpressure characteristics of methane/air premixed explosion under different equivalence ratios,several tests with varying length-to-diameter and equivalence ratios on the rise rate of peak overpressure and positive pressure duration were carried out through a self-built explo-sion test system.The main influencing factors affecting the pressurization characteristics of methane/air premixed ex-plosion were analyzed by the dimensional analysis method,and the calculation formulas of rise rate of overpressure peak and positive pressure during methane/air premixed explosion were proposed.The results show that the rise rate of the overpressure peak increases with the increase of the equivalence ratio,and the increase in length-to-diameter ratio makes the rise rate decrease gradually,which is different from the attenuation rate.The positive pressure dura-tion is gradually prolonged with the rise of the length-to-diameter ratio.However,the maximum positive pressure du-ration corresponds to different equivalence ratios with the length-to-diameter ratio changes.Furthermore,the calcula-tion formulas of the rise rate of overpressure peak and positive pressure duration of methane/air premixed explosion are obtained by the dimensional analysis method,and the feasibility of the formulas is verified by comparing the ex-perimental values with the theoretical values.It was found that methane/air premixed explosion is significantly affect-ed by the ignition position and equivalence ratio,which can provide a reference for the power evaluation and safety control of methane explosions.关键词
超压峰值上升速率/正压持续时间/长径比/甲烷/空气预混/量纲分析Key words
rise rate of overpressure peak/positive pressure duration/length-to-diameter ratio/methane-air premixed/dimensional analysis分类
能源科技引用本文复制引用
程建华,暴雯雯,杨小林,丁帅东,翁应康,张紫君..不同长径比对甲烷/空气预混爆炸升压特性影响研究[J].爆破,2025,42(2):13-21,110,10.基金项目
国家重点项目(U23A20600) （U23A20600）
企业委托大型科研项目(H22-541) National Key Project of China(U23A20600),Enterprises Commission Large-scale Scientific Research Project(H22-541) （H22-541）
