详细反应机理的航空发动机二维燃烧流场计算

对某航空发动机主燃烧室简化模型进行了基于正庚烷(n-C₇H₁₆)详细反应机理的燃烧流场数值模拟.在二维贴体坐标系下,计算过程采用了k-ε双方程模型来预估湍流特性,用EDC(eddy dissipation con-cept)湍流燃烧模型预估反应速率,用PSR(perfectly stirred reactor)模型的方法处理复杂化学反应项,得出了基于详细反应机理的温度场、组分浓度场,验证了机理文件中反应的某些组分与特定自由基之间的关系,对比了总包反应EBU-SRK(eddy break up-simplified reaction kinetics)的温度场,结果基本相符. 

Two-dimensional numerical simulation of reactive flow in aero-engine combustor with detailed chemical kinetic mechanisms

The paper presented a numerical simulation of turbulent flow in a reduced aero-engine combustor model with the detailed chemical kinetic mechanisms of n-C_7H_(16).Under the two-dimensional body-fitted grid,the turbulent characteristics were estimated by κ-ε equations,the reacting rate was estimated by eddy dissipation concept(EDC)model.In the paper the reacting model was perfectly stirred reactor(PSR),the concentrations of the major components and thermal flow results were gotten,and the relationship between some certain components validated the feasibility.The results of the EDC model basically agree with the one-step reactions with EBU-SRK(eddy break up-simplified reaction kinetics)model.