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首页> 外文期刊>Combustion Science and Technology >EFFECTS OF ADDITION OF SOLID PARTICLES ON THERMAL CHARACTERISTICS IN HYDROGEN-AIR FLAME
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EFFECTS OF ADDITION OF SOLID PARTICLES ON THERMAL CHARACTERISTICS IN HYDROGEN-AIR FLAME

机译：固体颗粒的添加对氢气-火焰中热特性的影响

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From the view of environmental protection against the use of fossil fuels, a great number of efforts have been exerted to find an alternative energy source. Hydrogen may become an alternative. However, the only product species of the hydrogen flame is H_2O, which emits only nonluminous radiation, so the radiation from a hydrogen flame is much smaller than that for a hydrocarbon flame. The authors designed and fabricated a laboratory-scale test furnace to study thermal characteristics of a hydrogen-air diffusion flame. In addition, the effects of addition of reacting as well as nonreacting solid particles were experimentally investigated. Among the total heat flux to the wall, about 75% was occupied by radiation while 25% was occupied by convection. When the aluminum oxide (Al_2O_3) particles were added, the radiative heat flux was reduced due to heat blockage effects. On the other hand, the total heat flux was increased when the carbon particles were seeded, because the overall temperature increased. The effects of swirl and excess air ratio were also examined. Additionally, a numerical simulation was carried out to simulate a hydrogen-air diffusion flame and was compared with the experimental results.
机译：从防止使用化石燃料的环境保护的观点出发，已经进行了大量努力来寻找替代能源。氢气可能成为替代方案。但是，氢火焰的唯一产物是H_2O，它仅发出非发光辐射，因此氢火焰的辐射远小于碳氢化合物的辐射。作者设计并制造了实验室规模的试验炉，以研究氢-空气扩散火焰的热特性。另外，通过实验研究了添加反应性和非反应性固体颗粒的效果。在到达壁的总热通量中，约75％被辐射占据，而25％被对流占据。当添加氧化铝（Al_2O_3）颗粒时，由于热阻隔效应，辐射热通量降低。另一方面，当注入碳颗粒时，由于总温度升高，所以总热通量增加。还检查了涡流和过量空气比率的影响。另外，进行了数值模拟以模拟氢-空气扩散火焰，并将其与实验结果进行了比较。

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