【摘要】 为了高效准确地评估航空发动机燃烧室关键参数对出口温度分布系数（OTDF）和径向温度分布系数（RTDF）这两个出口温度场特征参数的影响，统计了多台份发动机燃烧室部件的燃油喷嘴质量流量数、喷嘴轴向安装位置、火焰筒主燃孔直径和掺混孔直径等6个参数，对其分别进行无量纲化并核算了其概率密度分布函数（PDFs）。采用等面积间距法对该6个参数的概率密度分布分别取样，作为所发展的全环燃烧室出口温度分布低阶预估模型的输入，实现了变化参数条件下OTDF和RTDF的快速预测，获得了其概率密度分布，在概率95%的置信度区间内OTDF和RTDF的值分别不超过其大样本均值的1.044倍和1.169倍。将该6个参数相对其多台份发动机统计均值的比值确定在0.9～1.1的统一基准范围，作为模型输入获得OTDF和RTDF的分散性，识别出火焰筒掺混孔直径是影响出口温度分布性能分散性的高敏感性参数。更多还原

【Abstract】 A comprehensive statistical analysis was employed to evaluate the influences of key parameters on outlet temperature distribution factor(OTDF) and radial temperature distribution factor(RTDF) in multiple sets of aero-engine combustors. Six parameters of combustor included flow number(FN) of aero-engine fuel nozzle, the axial installation position of fuel injectors, the diameters of primary holes and dilution holes on the liner. Utilizing the probability density distribution functions(PDFs) of these six dimensionless parameters,an equal area spacing method was applied for sampling of these parameters as inputs into a developed low-order prediction model for the full-annular combustor outlet temperature distribution. The prediction model facilitated rapid calculations under varying parameter conditions and yielded the probability density distributions of OTDF and RTDF. Within the 95% confidence interval,the values of OTDF and RTDF respectively did not exceed 1.044 and 1.169 times of their large-sample means.Further analysis on the dispersion of OTDF and RTDF within a unified benchmark range of 0.9 to 1.1 relative to the statistical means of these six parameters in the multiple sets of engines was conducted,revealing the diameter of the dilution holes on the liner as a highly sensitive parameter affecting the dispersion of combustor outlet temperature distribution performance.更多还原