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The stability of turbulent hydrogen jet flames with carbon dioxide and propane addition

机译：添加二氧化碳和丙烷的湍流氢射流火焰的稳定性

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In the study the lift-off, blow-out and blow-off stability limits of hydrogen/propane flames and hydrogen/carbon dioxide flames were tested in three different mixing arrangements. The first was to premix hydrogen with carbon dioxide or propane to form a jet flame. The second was to add the gas as an annular jet around the hydrogen flame. The third was to inject into the centre of the hydrogen flame. Propane and carbon dioxide have the same density but create very different chemical kinetic changes when added to hydrogen flames. The results showed that when premixed with hydrogen, propane is more effective in flame lift-off and blow-out. The analysis of kinetic mechanisms revealed that the propane is the dominating fuel in determining the burning rate of the hydrogen/propane while carbon dioxide mainly acted to dilute the hydrogen/CO_2 mixture. Comparing the three mixing arrangements, the experiments showed that hydrogen flame can be effectively lifted or blown out when gases were in annular flow around the hydrogen flame. The isothermal mixing process of the co-flow configuration was discussed.
机译：在研究中，在三种不同的混合装置中测试了氢/丙烷火焰和氢/二氧化碳火焰的提起，吹出和吹出稳定性极限。首先是将氢气与二氧化碳或丙烷预混合以形成喷射火焰。第二步是将气体作为环形喷嘴添加到氢气火焰周围。第三是注入氢火焰的中心。丙烷和二氧化碳具有相同的密度，但是添加到氢火焰中会产生非常不同的化学动力学变化。结果表明，与氢气预混合时，丙烷在火焰起爆和喷出方面更有效。动力学机理分析表明，丙烷是决定氢/丙烷燃烧速率的主要燃料，而二氧化碳主要起到稀释氢/ CO_2混合物的作用。比较这三种混合安排，实验表明，当气体在氢火焰周围呈环形流动时，氢火焰可以有效地升起或吹出。讨论了同流构型的等温混合过程。

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