超燃冲压发动机燃烧室三维化学反应流场的数值模拟

3D NUMERICAL SIMULATION OF SUPERSONIC REACTING FLOWS IN SCRAMJET COMBUSTOR

关键词:  冲压进气燃烧室  超音速燃烧  三维流  反应动力学  数值仿真

Key words:  Ram air combustor  Supersonic combustion  Three dimensional flow  Reaction kinetics  Numerical simulation

摘要:

采用LU隐式方法强耦合求解有限体积法离散的完全N－S方程及组分方程，数值模拟超燃冲压发动机燃烧室内的化学反应流场。计算中采用了AUSM通量分裂格式，两方程的化学反应模型和Baldwin－Lomax代数湍流模型。计算结果与可能的实验结果进行了比较。

Abstract:

A three-dimensional numerical code has been developed to simulate supersonic reacting flows in scramjet combustor. The code employs an implicit, finite volume, Lower-Upper (LU), and time-marching method to solve the complete Navier-Stokes and species equations in a fully coupled and efficient manner. An upwind flux split method named AUSM is adopted to get crisp representations of shock and discontinuities. A global chemistry model is used to simulate the chemical reaction of hydrogen and air. Baldwin-Lomax algebraic turbulence model is used to enclose the governing equations. To testify the reliability of the code, the numerical results are compared with available experimental data.