甲烷掺混氢气的燃烧特性试验研究

通过在定容燃烧室内研究不同的初始温度、初始压力、燃空当量比、掺氢比下甲烷-氢气-空气混合气的燃烧压力变化规律,得到了上述条件对混合气最大燃烧压力、最大压力升高率、火焰发展期、燃烧持续期以及最大燃烧压力循环变动的影响.研究结果表明:其他初始条件不变时,甲烷-氢气-空气混合气在高温低压时火焰传播的更快;随着甲烷中掺氢比增加...

Research on Combustion Characteristics of Methane-Hydrogen-Air Mixture

The combustion characteristics of methane-hydrogen-air mixture in constant volume combustion chamber are studied in the case of different initial temperatures,initial pressure,equivalent ratio and hydrogen blend ratios.The effects of the above conditions on maximum combustion pressure,rate of maximum pressure rise,flame development time,combustion duration,and cyclic variation of maximum combustion pressure are obtained.The results show that the higher temperature and the lower pressure are helpful to achieve the higher flame propagation velocity while other initial conditions keep stable;as the hydrogen fraction increases,both the combustion velocity and combustion peak pressure gradually rise,the appearance time of combustion peak pressure is moved up,and the variation coefficient is obviously lower.