【摘要】 论述了采用纹影摄影术和高速摄影法观察分析氢气和空气预混合燃料在定容燃烧室内的火花点火燃烧过程 ,定性地分析了预混合氢气燃料燃烧的火焰形态和变化过程 ,以及燃烧室内的初始压力和空燃比对火焰传播速度及其燃烧压力的影响。通过采用纹影摄影术方法 ,初步揭示了预混合氢气燃料在定容燃烧室内燃烧时火焰初期紊流产生的机理 ,以及由开始的层流状火焰发展到湍流状火焰的过程。研究结果表明 ,预混合氢气燃料燃烧的火焰传播速度及燃烧压力明显地受燃烧室内的初始压力和空燃比的影响更多还原

【Abstract】 Combustion process of hydrogen air premixture fuel in a constant volume vessel was analyzed by schlieren photography and high speed video camera.The flame propagation velocity,combustion pressure and flame shape were analyzed qualitatively.The results showed that the flame propagation velocity and combustion pressure of hydrogen air mixture are obviously affected by the initial pressure of combustion chamber and equivalence ratio of mixture.The producing mechanism of the turbulence flame in the initial stage and the process from laminar flame to turbulence flame were exposed by schlieren photograph.更多还原