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以截面积为矩形截面的RQL模型燃烧室为研究对象,采用数值模拟方法分别研究了旋流器各参数(如出口角θ、轮毂与流路外径比z和旋流器间距)和淬熄段射流孔参数(如孔数和射流孔截面积)对模型燃烧室流场、温度场以及NOX排放值的影响。在数值模拟中采用的模型包括Realizable k-ε湍流模型、非预混燃烧模型、热力型NOX和瞬发型NOX等。通过对模拟结果进行比较分析得出结论:当模型燃烧室采用间距为69 mm、θ=30°、z=0.68的旋流器和总面积为635.85 mm2的12个淬熄射流孔的结构时,可以在满足燃烧室基本性能的前提下实现低污染排放。
Taking the RQL model combustion chamber with rectangular cross section as the research object, numerical simulation was carried out to investigate the relationship between the parameters of the cyclone (such as the outlet angle θ, the ratio of the hub to the outer diameter of the flow path z and the cyclone) Effect of parameters of jets (such as the number of holes and cross-sectional area of jets) on flow field, temperature field and NOx emission in the model combustor. The models used in the numerical simulation include Realizable k-ε turbulence model, non-premixed combustion model, thermal NOX and instantaneous NOX. Through the comparison and analysis of the simulation results, it is concluded that when the model combustor adopts a cyclone with a spacing of 69 mm, θ = 30 ° and z = 0.68 and 12 quench jet holes with a total area of 635.85 mm2, Can meet the basic performance of the combustion chamber to achieve low emissions under the premise.