中文摘要：

在定容燃烧弹内研究了初始压力为0．1MPa、初始温度为285K时掺氢天然气-空气-稀释气体混合气层流预混燃烧的火焰传播规律，获得了分别使用氮气和二氧化碳作为稀释气时，在不同掺氢比、稀释度和当量比下的无拉伸层流燃烧速率，并分析了氮气和二氧化碳稀释气对燃烧速率的影响．结果表明：无拉伸层流燃烧速率随着掺氢比的增加而增加，随着稀释度的增加而减小，二氧化碳对燃烧速率的作用强于氮气．

英文摘要：

The laminar combustion characteristics of natural gas-hydrogen-air-diluent gas mixtures were studied in a constant volume combustion bomb at the initial pressure of 0.1 MPa and the initial temperature of 285 K. Unstretched laminar burning velocity was obtained under various hydrogen fractions, diluent ratios and equivalence ratios by using nitrogen and CO2 as diluent gas respectively. The effect of diluent gas on burning velocity was analyzed. The results show that the unstretched laminar burning velocity increases with the increase of hydrogen fraction but decreases with the increase of diluent ratio. CO2 has greater effect-on burning velocity than nitrogen does.