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Combustion of residual steel gases: laminar flame analysis and turbulent flamelet modeling

机译：残留气体的燃烧：层流火焰分析和湍流小火焰建模

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In recovery combustion systems operating in the steel industry, energy is provided by boilers burning residual gases of blast furnace and coke oven. To help understand combustion of this particular type of fuels, a numerical study is conducted where the major chemical properties of steel gas flames are collected. The chemical composition of representative fuel and oxidizer steel gas is varied over a large range in calculations using detailed chemistry and complex transport properties. The chemical equilibrium compositions, premixed flame speeds and diffusion flame extinction strain rates are determined. The advantages and shortcomings of the use of vitiated air emerge, and its introduction into the boiler appears as an interesting alternative to reduce NO_x emission. The detailed information obtained with laminar flame calculations is also introduced in flamelet turbulent combustion modeling. Reynolds Averaged Navier Stokes (RANS) simulations of a test case burner are performed and some comparisons between numerical predictions and experimental results are presented.
机译：在钢铁工业中使用的回收燃烧系统中，锅炉燃烧高炉和焦炉的残留气体来提供能量。为了帮助理解这种特殊类型的燃料的燃烧，进行了一项数值研究，收集了钢制火焰的主要化学性质。使用详细的化学方法和复杂的传输特性，在计算中，代表性的燃料和氧化剂钢气的化学成分在很大的范围内变化。确定化学平衡组成，预混火焰速度和扩散火焰消灭应变速率。出现了使用通风的空气的优缺点，并且将其引入锅炉似乎是减少NO_x排放的有趣替代方法。在小火焰湍流燃烧模型中还介绍了通过层流火焰计算获得的详细信息。对测试用燃烧器进行了雷诺平均Navier Stokes（RANS）模拟，并给出了数值预测与实验结果之间的一些比较。

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