Premixed moderate or intense low-oxygen dilution (MILD) combustion from a single jet burner in a laboratory-scale furnace
Premixed moderate or intense low-oxygen dilution (MILD) combustion from a single jet burner in a laboratory-scale furnace
复制标题
DOI：
10.1021/ef200208d
复制
发表时间：
2011-05
期刊：
影响因子：
5.3
通讯作者：
Pengfei Li;J. Mi;B. Dally;R. A. Craig;Feifei Wang
中科院分区：
文献类型：
--
作者：
Pengfei Li;J. Mi;B. Dally;R. A. Craig;Feifei Wang
采用雷诺平均N-S方程（RANS）模拟和实验研究了初始条件对单喷嘴预混中、强低氧稀释（MILD）燃烧特性的影响。所考察的不同初始条件包括喷嘴面积（A）、当量比（Φ）、热输入（P）和反应物的初始稀释度（f）。当炉在预混合模式下操作时，对于MILD条件测量到非常低的NOx、CO和H2排放。数值计算结果表明，只有当Re超过某一临界值（Rec）时，在现有的炉膛和燃烧器系统中才能发生预混MILD燃烧。当Re ≥ Rec时，无论A、Φ或f如何变化，都能建立稳定的MILD燃烧。给出了基于炉膛温度和再循环率的预混MILD燃烧稳定极限图。
Impacts of initial conditions on the characteristics of premixed moderate or intense low-oxygen dilution (MILD) combustion from a single jet burner in a laboratory-scale furnace are investigated through Reynolds-averaged Navier–Stokes (RANS) modeling and experiments. Different initial conditions examined include the area of the nozzle (A), equivalence ratio (Φ), thermal input (P), and initial dilution of reactants (f). Very low emissions of NOx, CO, and H2 are measured for the MILD conditions when the furnace is operated under the premixed mode. The numerical results have shown that premixed MILD combustion can occur at the present furnace and burner system only when Re exceeds a critical value (Rec). When Re ≥ Rec, a stable MILD combustion can be established, irrespective of the variation of A, Φ, or f. The diagram of the stability limits for the premixed MILD combustion based on the furnace temperature and recirculation rate is also presented.