煤层气空气预混层流火焰特性试验  

Experiment on the Premixed Laminar Flames of Coal Bed Methane-air Mixtures

作　　者：郑斌[1] 刘永启[1] 李萍[1] 刘瑞祥[1] 高振强[1] 

机构地区：[1]山东理工大学交通与车辆工程学院,淄博255049

出　　处：《农业机械学报》2009年第8期23-26,35,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：山东省自然科学基金资助项目(Y2006F63);淄博市科技攻关项目(20062502)

摘　　要：利用高速摄影技术,在定容燃烧弹中研究了不同燃空当量比、初始压力和煤层气中CH4浓度对煤层气燃烧火焰传播速度和层流燃烧速度的影响。研究结果表明:在燃空当量比为1.1时层流燃烧速度最大;燃烧开始时,随着初始混合压力的增加,最大燃烧压力明显增加,火焰传播速度和层流燃烧速度减小,火焰半径大于40 mm后,层流火焰传播速度和燃烧速度又随初始压力的增加而增大;随着煤层气中CH4浓度的增加,层流燃烧速度和最高燃烧压力显著增大。The effects of bomb under equivalence ratios, initial pressures and CH4 concentrations on the premixed laminar flames propagation velocity and the laminar burning velocity of coal bed methane-air mixtures were studied in a constant volume combustion bomb by high speed video camera. The results showed as follows, when equivalence ratio is 1.1, laminar burning velocity has the largest value; in initial combustion stage, with the increase of initial pressure, maximum combustion pressure markedly increases, laminar flame spread velocity and laminar burning velocity decrease, and when the flame radius exceeds 40 mm, laminar flame spread velocity and laminar burning velocity increase; with the increase of CH4 concentration, laminar burning velocity and maximum combustion pressure increase.

关 键 词：煤层气 预混层流火焰 定容燃烧弹 

分 类 号：TQ038.1[化学工程] TD845[矿业工程—煤矿开采]